
Precalculus
I know I posted this already but.. I don't understand what exactly is the answer, since the answer key shows the intersection of the circle and hyperbole at (5,0) What about (7.5,0)???? By the way the graph has one intersection point... How do you know
asked by Anonymous on May 24, 2014 
Precalculus...repost.. The tutor didn't quite answ
Calculate the solution set. x^2+y^2+8x=15 9x^2+25y^2=225 My work: I did elimination...multiplied 25 to the top equation and got..... 16x^2200x600...I then used quadratic formula ... And got 7.5 and 5..... Is 7.5 an EXTRANEOUS SOLUTION because when
asked by Anonymous on May 24, 2014 
Precalculus
Calculate the solution set. x^2+y^2+8x=15 9x^2+25y^2=225 My work: I did elimination...multiplied 25 to the top equation and got..... 16x^2200x600...I then used quadratic formula ... And got 7.5 and 5..... Is 7.5 an EXTRANEOUS SOLUTION because when
asked by Anonymous on May 24, 2014 
Calculus
Will someone send me the ti 83 steps for: determine the graph of the equation: 9x^2+25y^2+z^2=225 if one is available.
asked by Pam on April 19, 2008 
math
can someone please help me with this elimination methods problem? 0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination method and give the ordered pair...
asked by Kristin on March 13, 2010 
Algebra
Identify the type of conic section that has the equation 9x^2 + 25y^2 =225 and identify its domain and range.
asked by Anonymous on December 4, 2016 
Algebra
Identify the type of conic section that has the equation 9x^2+ 25y^2 =225 and identify its domain and range.
asked by Aaron on December 14, 2016 
algebra
I just need a quick check before I hand in my work if you would...Thanks. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), (6, 4)…Is this correct?
asked by S on January 8, 2010 
Chemistry
A few questions I don't really get and need to see the work for A 50.0 mL sample of 0.55 M benzoic acid, C6H5COOH, a weak monoprotic acid, is titrated with 0.51 M NaOH. Calculate the pH at the equivalence point. Ka of C6H5COOH = 6.5 multiplied by 105.
asked by Dubs on April 22, 2010 
math
a line is drawn from the origin to a point on the ellipse 9x^2+25y^2=225.find the equation of the locus of midpoint of the line.
asked by ekpe on May 12, 2016 
Math
A chemist needs 22 liters of a 14% acid solution. He has a 10% solution and a 20% solution available to form the mixture. How much of each should be used to form the 14% solution? I'm having a really hard time forming an equation for this. I've
asked by Robert on October 5, 2016 
math
The equation P=240I8I^2 represents the power, P, (in watts) of a 240 volt circuit with a resistance of 8 ohms when a current of I amperes is passing through the circuit. Find the maximum power (in watts)that can be delivered in this circuit. I had posted
asked by Shirley on February 23, 2008 
MATH
Useing substitution/elimination method what is the solution set to 2x+y=1 x^2=y+2 a)(3,7) and (1,1) b)(3,7) and (1,1) c)(3,7) and (1,1) d)(3,7) and (1,1) I've really no educated guess so PLEASE HELP! You can make an educated guess by substituting
asked by Anonymous on January 16, 2007 
Algebra SOLVING LINEAR EQUATIONS AND INEQUALITIES
Please help Im am Grade 5 and my teacher is letting me do this. 1. Solve the solution by using elimination and substitution 3/x  2/y = 14 6/x + 3/y = 7 2. Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two
asked by Clyde on April 25, 2016 
Algebra 1
What is the solution set for an equation in which all numbers work? How big is the solution set for an equation that cannot be solved?
asked by Wendy on October 7, 2009 
precalc
I'm terrible at pre calc, could someone tell me if the solution set for log subscript 2 x + log sub 2 (x1)=1 is the solution 1? Using either the elimination or substitution method is the solution set for 4x + y =11 and 2x y = 7 is the answer (3, 1)?
asked by eragon on January 13, 2007 
alg.
solve the system by addition: 5x9y = 5 x+5y=15 I've tried this one over and over, but I can't seem to get the right answer. I don't even really know where to start. each time i try to do it, i go about it a little differently and i'm completely lost,
asked by j on August 14, 2007 
Chem.
N2+3H2 2NH3, The equilibrium constant for the chemical equation is Kp = 0.143 at 225 °C. Calculate the value of the Kc for the reaction at 225 °C.
asked by Anonymous!! on March 19, 2014 
Algebra IIPlease check my solution
Solve by elimination methodthanks fro checking my work 2x + 3y= 2 multiply this equation by 2= 4x + 6y = 4 4x2y = 28 4x + 6y = 4 4x 2y = 28 8y = 32 y = 4 2x + 3(4) = 2 2x + 12 = 2 2x + 212 2x = 10 x = 5 solution = (5,4)
asked by Joella on February 16, 2011 
HELP!
The problem using elimination/substitution methods what is the solution set to 3x 2y =4 and 5x=2y the choices a)(2,5) b)(2,5) c)(2,5) d)(2,5) Please, Please, Please, HELP! 3x2y=4 5x +2y=0 add the equations, solve for x. That makes it a or c. Put
asked by Anonymous on January 16, 2007 
Chemistry
Calculate the molality of a solution prepared by dissolving 225.5 g KNO3 in 825mL of water. Show your work
asked by Kayla on June 2, 2016 
drawls, math help
can you explain to me just one more thing so i can undestand it. Now i have an equation which is : 3x = 3x + 5 which I know has no solution to it, now whereas the equation 7x + 8 = 8 has zero as a solution. What is the difference between a solution of zero
asked by jasmine20 on January 3, 2007 
math
0.05x+0.25y=11 0.15x+0.05y=12 solve using the elimination method
asked by Kristen on March 13, 2010 
math
solve using the elimination method 0.05x+0.25y=11 0.15x+0.05y=12
asked by Kristen on March 13, 2010 
Chemistry
A buffer solution contains HC2H3O2 at a concentration of 0.225 M NaC2H3O at a concentration of 0.164 M. The value of Ka for acetic acid is 1.75 × 105. Calculate the pH of this solution using the HendersonHasselbalch equation. Could you please show
asked by Chemistry Chick on November 17, 2011 
Algebra 2
Standard form for both equation with steps 16x^296x+144+25y^2=400 16x^2+192x+576+25y^2=1600
asked by Spencer on August 6, 2015 
Algebra 2
Standard form for both equation with steps 16x^296x+144+25y^2=400 16x^2+192x+576+25y^2=1600
asked by Spence on August 23, 2015 
A Math Equation...Plz Help...
2x + 4 is always larger than or equal to zero. This means that the left hand side of the equation is always 6 or less, so there are no solutions. 6  32x + 4 = 12 So I just put NO Soution? No solutions, or if you have to write down the solution in the
asked by Count Iblis on December 2, 2006 
college algebra
1. find the equation of the line with the given properties. Express the equation in general form or slopeintercept form. perpendicular to the line 3x_y= 27; contains the point (9, 1) the equation of the line is ? 2. solve the polynomial inequality and
asked by confusedtwo questions please help on December 1, 2012 
MATH
Useing substitution/elimination method what is the solution set to x^2+y^2=25 4x3y=0 a)(3,4) and (3,4) b)(3,4) and (3,4) c)(4,3) and (4,3) d)(4,3) and (4,3) PLEASE HELP! There are two ways to do this. (1) Try each of the multiple choices in the
asked by Anonymous on January 16, 2007 
alGEBRA 2 help please would appreciate
find the foci of 9x^225y^2=225 I get this far a^2=5 and B^2=3 AND I KNOW I HAVE TO USE THE formula c^2=a^2b^2 i don't know what to do now if add it i get c^2=34 please help show the step thanks
asked by lisa on October 28, 2013 
Substitution Method in Algebra!HELP PLZ!
Use the Substitution method to solve the system of equations. 3x + y = 5 4x  7y = 10 multiply first equation by 4 multiply second equation by 3 thus both equations have same x or y value in this case it is the x value. 12x + 4y = 20 12x  21y = 30 solve
asked by Matthew on November 5, 2006 
math
Andrew has $2.75 in nickels and quarters in his coat pocket. If he has a total of 15 coins, which system of equations could you use to find the number of quarters in Andrews coat pocket? 1)x+y=15 0.5x+0.25y=2.75 2)x+y=2.75 x+y=15 3)x+y=15 0.05x+ 0.25y=2.75
asked by B8 on January 11, 2014 
CountIblis, can i bother you
Countiblis, i know that you might be busy do you mind if i ask you the following for help.Only if you can please. can you explain to me just one more thing so i can undestand it. Now i have an equation which is : 3x = 3x + 5 which I know has no solution to
asked by jasmine20 on January 3, 2007 
SCIENCE(PHYSICS)
A train travels 40 km/hr for 0.2 hr, 50km/hr for next 0.2hr and 60km/hr for next 0.4 hr.calculate the average speed of train. My Solution:1st hr. distance=40 multiplied by 0.2=8km 2nd hr.= 50 multiplied by 0.2=10km 3rd hr. =60 multiplied by 0.4=24 km
asked by YASH on May 25, 2011 
Chemistry
Using the standard reduction potentials, calculate the equilibrium constant for each of the following reactions at 298 K. 10Br + 2MnO4 + 16H+ > 2Mn2+ + 8H20 + 5Br2 Work: 2Br > Br2 + 2e (This would be multiplied by 5 to balance out with the upper
asked by Anonymous on December 2, 2009 
math,correction
Directions:Multiply Problem: ((x)/(3)+(3)/(4)) ((3x)/(4)(3)/(5)) so the answer for it i got: ((20x^2+20x36)/(80)) I worked it and I have what you have EXCEPT 29x instead of 20x. If you can't find the error, post your work and we can help you find it.
asked by Jasmine20 on January 24, 2007 
Math
x=y+3 5xy=2 Solve using Elimination I already solved the equation using Substitution, Graphing, and a table I just need a little more help on Elimination. I know that in Elimination they have to be in the same form so I put it in slope intercept which
asked by M on January 20, 2015 
Math check my answers
1. Evaluate. 8d  10 for d = 4 A.32 B.22*** C.26 D.46 2. write an algebraic expression for the sum of 3 coins and c coins. A.c + 3*** B.c/3 C.3c D.c3 3. Find the solution of the equation from the given numbers. x  2 =16: 14, 18, 21, or 12 A.12 B.14
asked by Sid.V on December 1, 2016 
calculus
solve the following inequality 15x16 less than or equal to 15/x is the point x=0 included in the solution set of the inquality? are the other finite pointsa of the interval included in the solution set? what is the solution set? please show work
asked by Heather on December 27, 2012 
Chemistry
The Ka values of H3PO4 are shown below. Ka1 7.5 multiplied by 103 Ka2 6.2 multiplied by 108 Ka3 4.8 multiplied by 1013 What is the pH of a 0.14 M solution of Na2HPO4?
asked by George on April 3, 2011 
Algebra
solve by elimination: 6a+2b = 48 6a+b = 57 What is the solution set ( , )?
asked by Richard on October 11, 2012 
help with solving
x^2+(x2)^2 = (2x6)^2 solve for x. thanks so much. Please keep in mind that tutors here won't simply do your work for you. I'm sure you'll get a better response if you show your work as far as you can get, so tutors will know where you get stuck. =) it
asked by q on August 3, 2007 
Algebra 116
1. Solve using the Elimination Method. 2r  7s = 57 7r %2B 2s = 39 What is the solution set ______? 2. Simplify 8[90(6014)]= ______ 3. Solve using the Substition Method. 5x %2B 7y = 41 x = 61  8y What is the solution _______? 4. On three consecutive
asked by MzMaria on September 30, 2008 
calculus
Please help with this question. I have a general solution to a differential equation of 18y^3/2= TOP LINE OF FRACTION is 2(x^26x+23)^3/2 and this is divided by 3.plus Constant .I work out constant c to be zero. Is this correct? What is the particular
asked by Tony on May 11, 2011 
Chemistry
This is a question I am presently doing right now which I found in my homework. I am quite sure that in (a) I have to use the Hasselbach equation though I am not sure how to work it out. If anyone knows any of the answers, and how you got to them, please
asked by Matthias on September 29, 2012 
Chemistry
This is a question I am presently doing right now which I found in my homework. I am quite sure that in (a) I have to use the Hasselbach equation though I am not sure how to work it out. If anyone knows any of the answers, and how you got to them, please
asked by Matthias on September 29, 2012 
Algebra
I am solving for sytems of equations using the elimination method. Book says answers are 0,1. I have tried solving for both x & y using both the 5 and 25 . I am not getting the 0,1 as my answer. 5x5y=5 25x25y=22
asked by G on April 1, 2008 
math
Ex 2: 2x+7=22 2x+77=227 2x=15 2x/(2)=15/(2) I do not have to switch the equality sign. Even if I did it would not look any different. x=7.5 Check: 2x+7=22 2(7.5)+7=22 my solution is that x=7.5 so I will just put that in to see if it works.
asked by Anonymous on September 22, 2010 
chemistry
A solution was prepared by dissolving 43.0 of in 225 of water. Calculate the mass percent of in the solution.
asked by help on October 1, 2010 
mathes for management
Use gauss Jordan elimination method to find solution set of 4x+5y+3z=23 3x+2y+z=10 2x+5yz=9
asked by legesse on December 13, 2016 
Algebra
Solve the following system of linear equations: 2x  3y + 6z = 12 5x + 2y  8z = 29 7x + 6y + 4z = 49 First, I did elimination for the first two equations. I multiplied the first equation by two, and the second equation by 3. 4x  6y + 12z = 24 + 15x +
asked by Anneliese on February 25, 2009 
Intermediate Algebra
Solve using the elimination method.Show work.If system has no solution state this or infinite solution 8x+10y=34 16x5y=43
asked by sherry on March 27, 2012 
math
Once you have created both sets of numbers, complete the following tasks. In each task, make sure to clearly label which set you are identifying or describing. Identify the elements of each set that you created. Calculate the mean of each set. Show your
asked by Layla on May 11, 2019 
chemisty problem help
Carbon12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 70 pm. Calculate the volume of the nucleus and the volume of the atom. What percentage of the carbon atom's volume is occupied by the nucleus? Can someone tell me how
asked by Tagen on February 8, 2007 
ChemB
CALCULATE PH OF THE SOLUTION THAT RESULTS FROM EACH SOLUTION A) 150.0mL OF 0.25M HF WITH 225.0 mL OF 0.30M NaF Help please, these buffer questions are confusing.
asked by ALISON on March 12, 2012 
Algebra
Solve using the elimination method.Show work.If the system has no solution or an infinite number of solution state ths...5x+4y=16,15x+2y=58
asked by sherry on March 22, 2012 
HELP!
The problem using elimination/substitution methods what is the solution set to 3x 2y =4 and 5x=2y the choices a)(2,5) b)(2,5) c)(2,5) d)(2,5) Please, Please, Please, HELP! Between a and c I believe it is c is that correct? Yes.
asked by Anonymous on January 16, 2007 
math
use gauss jordan elimination method tofind solution set of4x+5y+3z=23.3x+2y+z=10.2x+5yz=9
asked by Anonymous on June 6, 2018 
math
use gauss jordan elimination method tofind solution set of4x+5y+3z=23.3x+2y+z=10.2x+5yz=9
asked by Anonymous on June 6, 2018 
Intermediate Algebra (Math)
HELP PLEASE, Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x Ð 8y = 22 6x Ð y = 20 At first I tried to multiply by 8 but that did not work.
asked by Lyri on October 11, 2010 
PreCalculus Matrix
Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x  y + 3z = 12 x + 4y + 6z = 32 5x + 3y + 9z = 20 4 1 3 12 1 4 6 32 5 3 9 20 I believe that the solution does not exist and
asked by Alexa on June 8, 2016 
Chem
Calculate the concentration of NH4+ from ammonium chloride required to prevent the precipitation of Ca(OH)2 in a liter of solution that contains .10 mol of ammonia ans .10 mol pf calcium ion. I got the two equations but I do not know where to begin. The
asked by Anonymous on May 7, 2007 
Math
Please help!!!! Solve each system graphically. Be sure to check your solution. If a system has an infinite number of solutions, use setbuilder notation to write the solution set. If a system has no solution, state this. 6x  2y = 2, 9x  3y = 1 My answer:
asked by Jordyn on October 11, 2010 
physics
A granite column in a building is 8.50 m high and has a mass of 2.16 multiplied by 104 kg. (a) How much heat (J) is needed to increase its temperature by 10.5°C, given its specific heat is 0.200 kcal/kg·°C? (b) What is its change in length (m) if its
asked by Alice on July 24, 2013 
math
(6x5y)^2= 36x25y 6x5y (4x+5y)^2 16x+25y 4x+5y Please check to see if right. If not corrected for me.
asked by Elaine on June 2, 2010 
Chemistry
Calculate the initial molarity of KNH2 and the molarities of K+, NH3, OH, and H3O+ in an aqueous solution that contains 0.75 g of KNH2 in 0.255 L of solution. You may ignore the reaction of NH3 with water. I already found the initial molarity, but I am
asked by Trixie on February 23, 2010 
math elimination method
elimination method really confuses me. solve by elimination method 5r 3s = 17 3r + 5s =17 A. solution is ______ (ordered pair, integer or fraction) B. Infinitely many C. No Solution
asked by Lorri on July 9, 2010 
Math Please Help me!!!
3x^2+17x+10 *You have to factor completley but I don't know how too.Please help.! (3x+2 )(x + 5) Factoring asks this question: what two factors of 10 add to 17 when one is multiplied by three? Here is how you factor. Place two sets of parentheses. ( ) ( )
asked by margie on January 24, 2007 
Algebra
Could someone tell me what I am doing right or wrong? Problem Two: 5/9 + (2/9)x = 25/7 + (6/7)x – 2/3 Like signs are not collected at the beginning. This would make the equation unequal. To make both sides equal we first multiply all sides by nine and
asked by Aria on April 29, 2011 
algebra help me please
The equation below shows the area of a trapezoid, A, with a height of 9 cm, and one base 35 cm. A = 9 over 2(b + 35) Which of the following formulas correctly solves for the other base, b? b = 2A over 9 + 35 b = 2 multiplied by A over 9 − 35 b = 2
asked by oscar on September 7, 2015 
Algebra
3x+4y=12 solve for solution (0.)(.3/4) (,0) (8/3,) You are given the equation, and the x,y set. Iwill be happy to critique your work. Here is one as an example: 3x+4y=12 solve for solution (.3/4) 3x + 4(3/4)=12 3x + 3=12 3x=9 x=3
asked by Paula on September 16, 2006 
Algebra 116
I need help with these algebra problems please. 1.Solve by using the substitution method. a. 8x  3y =61 7x + 68 = y What is the solution system _____? b. 4m + n =27 m  2n = 9 What is the solution system_______? c. 8x + 9y = 15 6x + y = 19 What is the
asked by MzMaria on September 16, 2008 
college physics
An aluminum cup contains 225 g of water and a 40g copper stirrer, all at 27°C. A 400g sample of silver at an initial temperature of 87°C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium
asked by cat on December 3, 2012 
Math/Check
I have a few problems I need you to take a look at and tell me if I arrived at the right answer. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), (6,
asked by S on January 7, 2010 
Algebra
I have a few problems I need you to take a look at and tell me if I arrived at the right answer. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), (6,
asked by Shane on January 6, 2010 
Algebra/math
I have a few problems I need you to take a look at and tell me if I arrived at the right answer. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), (6,
asked by shane on January 6, 2010 
Algebra/no response yesterday
I have a few problems I need you to take a look at and tell me if I arrived at the right answer. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), (6,
asked by Anonymous on January 7, 2010 
algebra
I have a few problems I need you to take a look at and tell me if I arrived at the right answer. 1. I am to use the intercepts to graph the equation x+3y=6 I used the formula y=mx+b using 3 and 6 for x I got these as my ordered pairs to graph (3, 1), (6,
asked by shane on January 7, 2010 
college chem
how many grams of NH4Cl are required to prepare 250 mL of .122 M NH4Cl solution? I set this up using the molarity equation and the part that I was missing is moles. So I divided the 0.122 by .25 L and got .031 mol. Then I took that and multiplied it by the
asked by kelly on June 2, 2009 
math
An equation is shown below: 3 over 2 multiplied by x plus 7 over 2 equals 2 to the power of x What is the solution to the equation A.X=1 B.X=3 C.X=5 D.X=8 I think it could be d
asked by Isabella on December 8, 2015 
algebra2
solve the systems of equation: First : 4x2y = 2 Second: y = 4x7 Should i solve by using substitution, elimination or multiply then use elimination? Try adding them. Add up the left sides and the right sides (after rearranging the second equation) the x
asked by ann on July 26, 2007 
math
solve the polynomial inequality and graph the solution set on a real number line. express the solution set in interval notation x^3+x^2+64x+64>0 show work please
asked by Paul on January 9, 2013 
Algebra
A chemist mixed a 70% alcohol solution with a 30% alcohol solution to make a 45% alcohol solution. How many liters of each were used to make 120 L of a 45% solution? I tried solving this with elimination method and made two separate equations. For
asked by Annie on May 20, 2016 
Chemistry
An 8 Molar (aqueous) solution contains H2O and HNO3. The solution has an S.G. of 1.24 at 25oC. HNO3 is a strong acid that completely dissociates in water. a) Calculate the mass of I Litre of solution. b) Calculate the mass concentration (g/L) of HNO3 in
asked by Dodes on November 3, 2017 
MathAlgebra 1
Part 1: When writing linear equations, how do you determine which form of a line to use? Part 2: Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in pointslope form for
asked by Gabby on November 23, 2013 
mathplease help,need quickly
solve the polynomial inequality and graph the solution set on a real num ber line. express the solution set in interval notation x^3+x^2+64x+64>0 please show work
asked by anonymous on January 10, 2013 
Chemistry
Determine how many mL of solution A (acetic acidindicator solution) must be added to solution B (sodium acetateindicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e4M bromescol green
asked by Jake on October 29, 2012 
college algebra
A partial solution set is given for the polynomial equation. Find the complete solution set. (Enter your answers as a commaseparated list.) x^3 + 3x^2 − 14x − 20 = 0; {−5}
asked by Dee on November 18, 2013 
Chemistry
A solution is prepared by diluting 65.0 mL of 0.175 M methylamine, CH3NH2, to a total volume of 225 mL. Calculate the pH of the diluted solution. Kb (CH3NH2) = 4.40 x 104
asked by Mallory on June 26, 2011 
Chemistry
A is a solution of trioxonitrate (V) acid. HNO of unknown concentration B is standard solution of sodium hydroxide containing 4.00g per dm3 of solution 25cm3 portion solution B required an average of 24.00cm3 of solution A for neutralization. Using 2 drop
asked by EMMANUEL on June 6, 2018 
algebra
Thee area of the rectangle athletic field represented by the expressio 25y^24z^2 square meters. Write an algebriac expression to represent one possible set of dimensions(in the sense''length times width'')of the athletic field. include units with the
asked by Liz on February 11, 2011 
ALGEBRA again still need help !
need help solving this word problem, converting from words to an equation 48 equals a number increased by 6, and the sum, all multiplied by 5. I have the answer, but I am unable to set up an equation. answer  x=3 3/5
asked by Rose on October 9, 2008 
physics
An 11.4 kg block of metal is suspended from a scale and immersed in water, as in the figure below. The dimensions of the block are 12.0 cm multiplied by 11.1 cm multiplied by 11.1 cm. The 12.0 cm dimension is vertical, and the top of the block is 5.00 cm
asked by PJ on April 17, 2012 
maths
a conical tank open at the top is 4m and has a top radius of 1m its filled with water and after 2 hours, the depth of water dropped to 1m due to evaporation.set up a differential equation for the depth of water as a function of time.set up an equation for
asked by apollo on November 9, 2011 
PreAlgebra
I need to check my work... estimate the following products or quotients 17 11/12 divided by 6 1/10 The first step I did was convert to improper fraction then I multiplied after changing the reciprical, and then I multiplied the numerators and then
asked by Anonymous on July 31, 2009 
chemistry
I have many questions. I have a test tuesday and need to get these problems done and understand them today because i am currently studying. I am in college and my professor has not emailed me back regarding solutions for the review problems she posted. Is
asked by Sarah (C) on April 23, 2011 
Chem
Calculate the [NH4+] in solution that is 0.25 M NH3 and 0.20 M NaOH. (Kb for NH3 = 1.8 x 105) I set up ICE from the equation: NH3 + H20 NH4 + OH I 0.25 0 0 C x +x +x E 0.25x x x 1.8 *10^5 = x*x/ 0.25x 4.5* 10^6 = x2 took the square root to
asked by AMI on April 6, 2010 
Chemistry
Calculate the pH of the solution that is prepared by mixing 26.06g of ammonium iodide (MM=144.942) and 5.08g of ammonia (MM=17.034g) in enough 0.066 M HCI to produce 1.00L of solution. Kb(NH3)=1.76x10^5 I converted 24.06g and 5.08g to moles and i now I
asked by nns40760 on December 1, 2014 
Algebra
The Coffee Counter charges $9.00 per pound for Kenyan French Roast coffee and $8.00 per pound for Sumatran coffee. How much of each type should be used to make a 20lb blend that sells for $8.40 per pound? Here are the 2 equations (or system of equations)
asked by Valeria on February 20, 2009
Pages
 1
 2
 3
 4
 5
 6
 7
 8
 9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
 1000
 1001
 1002
 1003
 1004
 1005
 1006
 1007
 1008
 1009
 1010
 1011
 1012
 1013
 1014
 1015
 1016
 1017
 1018
 1019
 1020
 1021
 1022
 1023
 1024
 1025
 1026
 1027
 1028
 1029
 1030
 1031
 1032
 1033
 1034
 1035
 1036
 1037
 1038
 1039
 1040
 1041
 1042
 1043
 1044
 1045
 1046
 1047
 1048
 1049
 1050
 1051
 1052
 1053
 1054
 1055
 1056
 1057
 1058
 1059
 1060
 1061
 1062
 1063
 1064
 1065
 1066
 1067
 1068
 1069
 1070
 1071
 1072
 1073
 1074
 1075
 1076
 1077
 1078
 1079
 1080
 1081
 1082
 1083
 1084
 1085
 1086
 1087
 1088
 1089
 1090
 1091
 1092
 1093
 1094
 1095
 1096
 1097
 1098
 1099
 1100
 1101
 1102
 1103
 1104
 1105
 1106
 1107
 1108
 1109
 1110
 1111
 1112
 1113
 1114
 1115
 1116
 1117