Wednesday

October 1, 2014

October 1, 2014

Number of results: 122,023

**chemistry**

I need help solving this question.. An aqueous solution of ethylene glycol (C2H6O2) IS 40% ethylene glycol by mass, and has a density of 1.05g/ml. what are the molarity, molality fraction of the solution?
*July 7, 2010 by Linda*

**math,help**

can someone help me with this i am lost now i've been doing math for the past 8 hrs. Problem # 1 solve: 4(x-10)-3x=x-40 Problem # 2 solve for t: a = p + prt Problem#3 translate to an algebraic equation 7 less than the quotient of a number and 3 is twice the same number problem...
*March 18, 2007 by jasort20*

**MGT**

i am really stuck big time here... Decision making is an important supervisory function and often a difficult one. the advantages and disadvantages of group decision making, and the differences between decision making and problem solving.
*October 14, 2008 by dawn*

**Algebra 2**

I need help with this problem because I do not have a graphing calculator. Explain how you would solve this equation using your graphing calculator in five steps then give the solution. 2x- 3y=8 5x+ 4y= 11 Also how do you determine how many solutions a system of equations has ...
*October 22, 2007 by Christian*

**Chemisty**

Before solving the problem write a balanced chemical equation Excess aqueous NaI was added to 50 mL of aqueous CuNO3 solution, and 14.2 g of CuI precipitate was formed. What was the molar concentration of CuNO3 in the original solution? Answer in units of M
*April 12, 2013 by Nick*

**Algebra 1**

Find the y-intercept of the two coordinates ( 2, -5) and ( 6, 3). Please help me with this question and please explain to me and show me how to find Each step to solving the y- intercept. Thank you 😄
*November 3, 2013 by Lucy*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*January 22, 2012 by mo*

**Physics**

At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the magnitude and direction ...
*January 22, 2012 by mo*

**Math**

What is the exact value of csc^2 210degrees - cot^2 210degrees? Can you make a generalization about the value of csc^2 theta - cot^2 theta? I'm not sure what to do, I'm familiar with the terms but not sure how to go about solving the question.
*February 11, 2010 by Phillip*

**Math**

Here is the math problem. 150 is 75% of what number? I know the rate is 75 percent and the base is 150. I am looking for the amount. My questions is how to find the answer? Do I divide? Okay maybe I am missing a huge section as to finding the answer to this question. I went ...
*June 28, 2007 by marinda*

**Grade 3 math**

Never thought I would have a problem with Gr. 3 math - lol - but it goes like this. Write the addition or subtraction fact you will use to calculate each answer. Then add or subtract. 70 50 120 160 +30 +60 -30 -80 My question is what would the fact be???
*December 30, 2007 by rebecca*

**Math**

I need help solving this logarithmic function: x = log3(4^3).
*January 31, 2008 by Danielle*

**Math**

I need help solving this using the substitution method 4p-2q= 16, 5p + 7q= 1
*April 17, 2008 by anonymous*

**math**

I need help solving this non-linear inequality:6x^2>6+5x
*April 30, 2008 by Brittany*

**math**

what are the methods on how to do comparisons? (solving linear systems)
*July 5, 2010 by amitaf*

**math**

solve for x x+8=-1 solving with addition and subtraction(type in)
*May 14, 2009 by micheal*

**math**

I could use some help solving this equation pleasex^3 x+5=3
*May 28, 2010 by tammy*

**Math**

I'm stuck on solving this one. If I could get some help please. -6 le x/2 - 4 lt -3
*February 11, 2011 by marco*

**Math**

solving using the solution method. x+10y=41 x+9y=37 =
*July 2, 2011 by Ms.Ellis*

**math**

I need help in solving two-step inequalities. 7 - 4w <_ 19
*November 2, 2011 by jared*

**Math**

Given f9x0=x2=3x-5 on {-1,3} show f(x)= 10 without solving for x
*June 11, 2012 by Mark*

**Math**

When solving a system algebraically how can you tell if there is no solution
*February 17, 2014 by Taylor*

**Math**

Identify the extraneous solution when solving √x+2= x
*April 5, 2014 by Alice PLEASE HELP ME*

**Math**

Identify the extraneous solution when solving √x+2= x
*April 5, 2014 by I DONT UNDERSTAND*

**Math **

solving using the elimination method 2r-7s=-6 7r_2s=32
*August 10, 2014 by Keya *

**math**

solving equation (b-c)x˛ + (c-a)x + (a-b) = 0 folling roots are obtained
*September 10, 2014 by Nithin*

**math...help please!**

ok i REALLY am stumped. please help! it is a sequence problem here is the problem.... 120,60,30 __, __, __. if you could give me the rule for this problem and the next 3 numbers that would be so great!!!!!!
*September 18, 2007 by Rebekka*

**problem solving**

If a circuit has a 3.9 k ohms resistor and a 5 uF capacitor, find the current flow in the circuit at 0.005 seconds, if the maximum current flow in the circuit is 1.5 mA.
*November 1, 2010 by milton*

**algebra**

I've seen the exclamation point (!) put after numbers (ex. 3!), but I don't know what they mean. Can somebody tell me the steps on solving a problem like this? Thanks!! ! means factorial. 5! means 5*4*3*2*1 5!/3! means (5*4*3*2*1)/(3*2*1) which is equal to 5*4 or 20 Ohhhhhhhh...
*April 24, 2007 by Emily*

**Trigonometry (Logarthims) **

Give checks to the following two questions Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" without logarithms i can do this problem easily and i have. but when i try solving it with logarithms i keep getting...
*February 24, 2011 by Anon*

**chemistry**

Benzene has a heat of vaporization of 30.72kj/mol and a normal boiling point of 80.1 C . At what temperature does benzene boil when the external pressure is 410 ? This is how I am solving this problem, ln(415/760)= (30720/8.314)*(1/80.1 - 1/T2) It is asking to answer using two...
*January 25, 2009 by Lost*

**Physics**

You are given vectors A = 5.0i - 6.5j and B = -2.5i + 7.0j. A third vector C lies in the xy-plane. Vector C is perpendicular to vector A and the scalar product of C with B is 15.0. Find the x and y components to vector C. Here's the step by step from the book that I'm having a...
*August 30, 2014 by Vectors*

**calculus**

A question on my math homework that I can't seem to solve... Rotate the region bounded by y=x^2-3x and the x-axis about the line x=4. Set up the integral to find the volume of the solid. I'm pretty sure that the integral is in terms of (dy), and has bounds of 0-4. Using the ...
*January 24, 2009 by Michelle*

**Chemistry - electron configuration**

Hello Dr.Bob. Could you please take a look at the following question? I know the correct answer for it, but I'm not sure how to go about solving it. Which ground state electronic configuration will most readily ionize to a 2 + cation? A) 1s22s22p63s23p64s23d10 B) ...
*April 19, 2013 by Constantine*

**Psychology**

A theory can be defined as: a an attempt to test behavior and thought process. b an accurate description of problem-solving behavior. c the basis for relationships among facts and principles. d the application of the scientific method through statistics. I think the answer is ...
*April 25, 2011 by Nicci*

**math**

I REALLY NEED HELP IN SOLVING THIS PROBLEM PLEASE HELP!your high school diploma from american academy landed you to a job paying good money.you were wise and saved $150,00to buy your own company.the nuts are .01 pernut.you say you are wise and you are buying 3million nuts and ...
*March 8, 2008 by JESSICA*

**problem solving**

Suppose your car gets 36 miles per gallon of gasoline, and you are driving 45 miles per hour. Using unit analysis, find the number of hours it takes to use 1 gallon of gas. I got 48 minutes but I'm not sure.
*December 8, 2012 by ben*

**biostatistic**

I am sorry, I do not know how one question is printed so many times. There was some problem in submission of question and when it is submitted, it is printed so many times.
*December 11, 2012 by nono*

**graph**

How "Graphs" can play a role in the daily practice life in solving different kind of problem Graphs are visual representations of quantitative relationships. Viewing the relationships visually can make certain facts about these relationships more evident. I hope this helps. ...
*January 18, 2007 by queen*

**Math**

Need help solving this problem please. Andrei buys a painting and sells it to Boris Andrei makes a 60% profit on the sale Boris sells the painting to Clarissa Clarissa pays 1.5times the price that andrei paid for the painting Boris made a loss What is his loss as a % of the ...
*June 23, 2008 by Maggie*

**to bobpursley,math**

This is what i have am i wrong or correct.Or how can word it or modify it to be with what the directions are asking? Directions: Create one statement in English representing an algebraic relationship. My answer: PROBLEM: A DOZEN EQQS COST $1.20. WHAT IS THE PRICE OF EACH (1) ...
*January 1, 2007 by jasmine20*

**math**

What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model might work. ...
*October 26, 2010 by glenn*

**math**

write and solve a word problem that can be modeled by the difference -4 - 10. My dog lost 4 ounces this year And 10 ounces last year. What is the Difference in weight loss? Or what is total weight lost? I am not sure I'm doing this right. The answer I got to the original ...
*September 20, 2014 by alexis*

**Math**

How do you work this problem step by step? p-12 when p= 22 We don't know what book you are using and probably none of us has a copy if you told us the name of the book. Please post your question and someone will try to help. Please be specific and tell us exactly what you don'...
*September 7, 2006 by tonya*

**Math**

I have a problem..... -4(2x-3)=-8x+5 I understand first you distribute the -4 so you would have -8x+12=-8x+5 Then if you try and move x over to either side you completley get rid of x.... am I missing something or is this problem not solvable? Thank you I think I just solved ...
*March 29, 2007 by russell*

**stastics**

solving problem the chicago public school system has about 680 schools about 130 of the schools will be closed. if the five schools are chosen at random find the probability that at least three of them willl be closed
*April 3, 2013 by lilly*

**Chemistry**

The boiling point of an aqueous solution is 102.16 C. What is the freezing point? Dr. Bob, If you happen to answer this question, I was the one that a question earlier about how to know what Kf constant to use [water vs benzene?] and i didn't notice that it was given in the ...
*February 17, 2012 by Tracy*

**chemistry**

Posted a question earlier but it was the wrong question. If anyone could help it would great if you could explain this would help also. Thanks ^ = subscript Calculate ke for(equlibrium concentration below problem 2CO^2(g) + heat 2CO(g) + O^2 [0.103] [0.024] [1.18 x 10^2]
*January 5, 2010 by Shanta*

**Algebra**

Is (0,3) a solution to the equation y =x + 3 his is my teachers answer to my question of usage of the 2 numbers mentioned as possible solutions. yes it does make a difference. (4,8) is called an ordered pair. Ordered pairs are always in the form (x,y) That means the problem ...
*August 26, 2014 by Faye*

**College Algebra**

Problem: Use Common or Natural Logarithims to solve the exponential equations symboliclly. 2e^7x+4=4 (Round to four decimal places) I tried solving this way 2e/2^7x+4=4/2 e^7x+4=2 ln e^7x+4=ln 2 7x+4=ln 2 7x+4-4=ln 2-4 7x=ln 2-4 7x/7=ln 2-4/7 x=ln 2-4/7 then I at a lose at ...
*November 14, 2010 by Lee*

**Math - Alegbra 2**

In a certain math class, each student has a text book, every 2 students share a book of tables, every 3 students share a problem book, and every 4 students share a mathematics dictionary. If the total number of books is 75.. how many students are in a class? how many students ...
*December 2, 2006 by AS*

**math**

can someone check my answer Graph by first solving for y. x + 2y = 8 x-x+2y=8-x 2y=8-x 2y/2=8/2-x y=4-x y=4-x/2 y=4-1/2x
*January 11, 2008 by amy*

**Math**

I need help on two problems. How would you go about solving: 1. 3(a-5) + 19= -2 2. -9 - 3(2q-1)= -18
*October 1, 2008 by Faye*

**math**

what is the difference between ( and [ in context to solving algebric equation?
*June 27, 2009 by Ted Mosbi*

**math**

1) x+8y=33 -x+4y=3 I need help solving this one using the elimination method!
*March 13, 2010 by Kristin*

**Math**

Why is it necessary to perform a check when solving rational equations?
*August 5, 2010 by Jayde*

**math**

17x – 42 = -39 i need to show the steps for solving this equation
*October 14, 2010 by Jeninifer*

**Math**

Solving quadratic equations by graphing? 3. x2-4x + 6 = 0 4. x2-4x-1=0 5. 4x2-12x + 3 = 0 6. x2-2x-4=0
*February 27, 2011 by Erin*

**Math **

"Solving a system involving three unknowns." 3d+e-2f=-14 2d-3e+4f=-23 5d+4e-10f=-13
*May 17, 2011 by Anonymous*

**Math**

Help Solving These? There Are more like these , but i need examples to help me with the others. 1.5/2y+6 + 1/y-2=3/y+3 2. 3/3x-2 = 4/2x+1 3.5/3x - 1/9 = 1/x 4.2/x^2-x-12 -6/x+4 = 2/x-3
*August 21, 2012 by Unknown*

**Math: Solving Trig Equation**

9tan (x) - 9 sec^2 (x)/ tan (x)
*March 31, 2013 by Kristi*

**Math**

Need help solving this! Use the following information to find y: m=-3 (5,2) and (6,y)
*November 24, 2013 by Anonymous*

**Math help **

I need help on these problems. There over solving equations by factoring. 1.4x^2=8
*March 5, 2014 by Anonymous*

**math**

solving equation z˛-6z+9=4√(z˛-6z-6) following roots are obtained
*September 13, 2014 by Nithin*

**Calculus**

A curve is defined by the parametric equations: x = t2 – t and y = t3 – 3t Find the coordinates of the point(s) on the curve for which the normal to the curve is parallel to the y-axis. You must use calculus and clearly show your working, including any derivatives you need to ...
*July 18, 2014 by Daksh*

**Math**

Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem? I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I am lost after that This is a multiple choice question and I am not getting any of the choices a.) -161/...
*October 12, 2008 by David*

**ICS**

I need help solving this question. "Two charges are 10 meters apart. The charge on the positive particle is 1.0 C and the negative charge is 10 Coulombs. Calculate the magnitude of the electrostatic force of attraction between these two charges."
*January 25, 2008 by william*

**urgent urgent algebra**

find the composite function fog f(X) = 1/X-5,g(x)-6/x question 2 find inverse, domain range and asymatotes of each function f(x)=3+e^4-x can some one help me please been stuck on these for 2 days need help solving thank you
*March 19, 2013 by zachary*

**algebra**

Five (5) years ago, you bought a house for $171,000, with a down payment of $30,000, which meant you took out a loan for $141,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the following information: ...
*February 22, 2013 by mary*

**Physics**

An umbrella with a diameter of 1 m turns 22 rev every 44 seconds. If it's 1.5 m from the ground, calculate the time it takes for a drop to reach the ground and the distance away from the umbrella a person should stand so as to not get wet. For this problem I made a = (0, -g) ...
*November 9, 2012 by Leslie*

**Chemistry**

I need to know if I am anywhere in solving this problem: Please tell me if this is correct. The pH of a solution: 0.20 M CH3COOH and 0.10 M CH3COONa pH=pKa+log{[CH3COONa]/[CH3COOH]} pH= -log(1.8x10-5)+log{0.10/0.20} pH= 4.74+log 0.50= 4.74-0.30= 4.44
*May 6, 2010 by curtis*

**Math**

The question i'm having a problem with is the following: copy and complete: 3t-4 is a(n)_?expression and 5+13 is a(n)_? Expression. Do they mean a numerical expression?
*September 5, 2013 by Dylan*

**Math**

I need help with this problem: If N= {1,2,3,4,....}, A= {x/x=2n-1, n E N}, B={x/x=2n, n E N}, and C= {x/x+2n +1, n=0, or n E N}, find the simplest possible expression for each of the following: a. A U C b. A U B - the U stands for union c. A (intersects) I can't find the ...
*September 17, 2006 by Avery*

**Math help please last question**

Solve the equation. 10. 2(4x -4) + 2(3x + 2) = 360 Can you please help me on this problem? Could you explain it please? I'm confused...
*September 27, 2013 by Charlotte*

**problem solving**

place a counter on the left side,place a counter on the right side then color the middle cloud. What is a counter
*September 29, 2011 by Jon*

**calc**

let y=2x-8. What is the minimum value of the product xy? I'm not really sure how to do this... I tried taking x*(2x-8), and the min is 0. but then i wanted to see if it was the same when solving for x, and i got a min of -8. How do i do this problem? thanks, but i found which ...
*May 1, 2007 by Mischa*

**physics**

determine the tension in each cable below. draw a force diagram for the system before solving the problem. Case A- ball suspended on one cable Case B- ball suspended on by two cables
*October 11, 2012 by Madison*

**college problem solving**

a certain two-digit number is 6 less than the sum of its tens digit and 7 times its units digit. if the digits are reversed the number is increase by 27. fin the original two-digit numbers
*November 24, 2013 by luckybee*

**business math**

Term of Loan/Date of Loan using Banker's Rule? I need helps in solving this question. I have to submit it by today.Tq On 4 Oct 2010, Alia paid $8200 for his loan of $8000 made on a certain date. If the simple interest rate was 5%, determine: a)the term of the loan b)the date ...
*June 30, 2011 by Shadow of me*

**Chemistry - Photons**

Water is exposed to infrared radiation of wavelength 2.5×10−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.5 g of water by 2.5 K? -------------------------- I tried solving this ...
*December 4, 2012 by Amy*

**Chemistry - Photons**

Water is exposed to infrared radiation of wavelength 2.5×10−4 cm. Assume that all the radiation is absorbed and converted to heat. How many photons will be required to raise the temperature of 2.5 g of water by 2.5 K? -------------------------- I tried solving this ...
*December 7, 2012 by Amy*

**Physics**

I'm not sure how to go about solving this problem the algebra gets very messy... At what distance formt he EArth will a spacecraft on the way to the Moon experiance zero net force due to there two bodies because the Earth and Moon pull with equal and opposite force? THANKS
*December 23, 2009 by Jake*

**Algebra**

In 2004, about 233 million people in the US were aged 14 or older. They consumed, on average, 2.23 gallons of alcohol per person. Use scientific notation to estimate the total number of gallons of alcohol consumed by this age group. What is the formula for solving this problem?
*March 12, 2012 by Anonymous*

**algebra 1b**

Solve the problem by stating the equation you would use to solve and then solving it. After receiving discount of 12.5% on its bulk order of printer paper, johns office supply pays $3200 . what was the price of the order before the discount ? round to the nearest dollar. in
*June 11, 2012 by Dee*

**maths**

can you help me with this? cos2A=cossquareA-sinsquareA/cossquareA+sinsquareA=cossquareA(1-tansquareA)/cossquareA(1+tansquareA) I encountered this situation while solving trignometric problem.can you tell how does this come?
*October 6, 2012 by help me out it's urgent*

**problem solving**

Erica painted a picture of her dog. The picture has an area of 3600 cm square and is square. She has placed the picture in a frame that is 5 cm wide. What is the perimeter of the picture frame?
*April 27, 2014 by Anonymous*

**financial project**

Five (5) years ago, you bought a house for $171,000, with a down payment of $30,000, which meant you took out a loan for $141,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the following information: ...
*March 2, 2013 by Anonymous*

**math**

I do not know how to answer this question. Would someone please help me with each of the four question below? Thank you. Question 1. Write the sample space for the outcomes of tossing three coins using H for heads and T for tails. Question 2. What is the probability for each ...
*February 17, 2011 by Dave*

**mat115**

Please help with this math problem. The directions are Add. Must show work. 4 2/7 + 1 5/7 I appreciate your help with this math problem. Thanks so much.
*August 29, 2010 by adore001*

**history.**

another question for "government is not the solution to our problem, Government is the problem" would the significance of this quote in illuminating a theme in US history be: that people shouldn't rely on the government? Sorry, I might have two more questions after.
*August 28, 2010 by Amy~*

**Word Problem- Algebra**

1. Multiply a number by 4, then multiply this product by 5, then you get 80 Whats the way to solve it, the equation. 2. Add 4 to a number, then subtract 5 from the sum, and you get 43 Whats the equation to solving that if anyone can answer either of those, that'd be great. 1. ...
*January 20, 2007 by Sam*

**Algebra**

I need a jump start in setting up the equations etc when solving for vertex, line of symmetry and deciding maximum/minimum This is the problem I am starting with f(x)= -2x^2+2x+8 We are looking for the vertex, line of symmetry and the max/minimum I cannot seem to get this ...
*May 5, 2009 by deranged*

**4 grade math**

i need help on this problem. make 36/9 into a false number sentence? please! help me to understand this math problem thank you for your kindness.
*November 3, 2009 by samie*

**Math**

Dear Reader, Can you help me with my math problem on my homework please? There is nobody at my house who can help me yet. So when you get the chance can you help me with my problem? Thanks for reading. From, Portia1214
*March 8, 2012 by Portia*

**math**

we are trying to help my son with his math and we are not sure how to do the problem and since his school has no books to send home to help us we came here the problem is 1/8x=1/4
*February 20, 2014 by Angela*

**Trig**

The problem is: an airplane is flying in the direction 120 degrees with an airspeed of 320 mph, and a 35 mph wind is blowing in the direction 60 degrees. The question ask to find the true course and the ground speed. To solve the problem I have done this: Flying 120sin 320_+...
*June 2, 2014 by Morgan*

**chem**

Hint: Remember that reactions happen in moles. So figure out the moles that reacted then use the molarity formula to continue solving the problem. What volume of 0.699 M K3PO4 is required to react with 68 mL of 0.661 MMgCl2 accord- ing to the equation 2K3PO4 + 3MgCl2 ! Mg3(PO4...
*September 5, 2012 by John*

**Math**

This is a continuation of a math problem I posted earlier. I'm a little confused by this question. From your equation, when during the day would the temperature be 30C? (2 marks) The equation I obtained was: T(t) = 5.9 sin( πt/12 + 7π/6 ) + 27 Any help would be ...
*January 14, 2013 by Anonymous*

**Math**

I have no idea how to understand quantitative comparison questions which involves the understanding of arithmetic mean. I need to understand the question first to do the problem, please explain. Thank you
*May 12, 2009 by DANA*

**life science , geography , history and math literecy**

I am a grade 11 student and want to follow careers linked to geograpy . My problem is that most of the careers I am in interested in want pure math and im doing math literecy . My question is that , Is it possible for me to start mathematics in University so that I can follow ...
*September 29, 2013 by felicia*

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | **9** | 10 | 11 | 12 | 13 | 14 | 15 | Next>>