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March 27, 2015

Search: mathematics: algebra;equations

Number of results: 39,134

economics
Suppose that the free market labour supply and labour demand equations are given by Qs = 5W and Qd = 30 - 5W. If the minimum wage were set at $2.50 an hour, how many people would not be able to find work?
January 27, 2012 by Ricky

Math (Calculus)
Use the disc method to find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the indicated line. y=x^3, y=0, x=2 a)the x-axis b)the line x=4
May 9, 2014 by Sherman

Statistics
Your mathematics instructor claims that, over the years, 88% of his students have said that math is their favorite subject. In this year's class, however, only 21 out of 32 students named math as their favorite class. The instructor decides to construct a confidence interval ...
October 26, 2012 by Oops

AP Statistics
Your mathematics instructor claims that, over the years, 88% of his students have said that math is their favorite subject. In this year's class, however, only 21 out of 32 students named math as their favorite class. The instructor decides to construct a confidence interval ...
November 3, 2012 by Blegh

physics-mechanics-collisions,momentum, impulse
You are at the controls of a particle accelerator, sending a beam of 2.40×107 protons (mass ) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of the unknown element. All such protons...
October 28, 2012 by HANNE

Mathematics - Trigonometric Identities
Let y represent theta Prove: 1 + 1/tan^2y = 1/sin^2y My Answer: LS: = 1 + 1/tan^2y = (sin^2y + cos^2y) + 1 /(sin^2y/cos^2y) = (sin^2y + cos^2y) + 1 x (cos^2y/sin^2y) = (sin^2y + cos^2y) + (sin^2y + cos^2y) (cos^2y/sin^2y) = (sin^2y + cos^2y) + (sin^2y + cos^2y)(sin^2y) / (sin^...
November 8, 2007 by Anonymous

Math-Algebra 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 point-slope form for the line that passes ...
November 23, 2013 by Gabby

mathematics
1 round 234508 to the nearest thousands 2 round 45099 to the nearest thousands 3 round 8650 to the nearest thousands
December 3, 2012 by alana

probability-April
The probability that a student passes Mathematics is 2/3 and the probability that he passes English is 4/9. If the probability that he will pass at least one subject is 4/5, then what is the probability that he will pass (i) Both the subjects? (ii) Exactly one of the subjects...
April 18, 2013 by Anonymous

Mathematics
What is the difference between 12√2 and 12? What is the difference between 6√2 and 6?
March 10, 2015 by Victoria

Algebra 1
Lately I just have blacked out in my algebra 1 class. Here's a equation on my worksheet, and I would be happy if you could show in steps how you got your answer. Thank you. (2x²+5x+3)-(x²+2x+1)
September 8, 2009 by Samantha

Algebra
I need some help with algebra I'm not sure how to get to the answer. Find the number of terms in each sequence. 1. a1=4 an=42 d=2 2. a1--0.3 an=-36 d=2.1 3. 1/12, 1/8, 1/6, 5/24, 1/4,......9/8 Evaluate each sum. 1. There is an e like symbol that has a 15 on top on the bottom n...
April 8, 2013 by Jenny

Plz Check my Geometry(sOo0n)
1.) Given points A(-4, 5), B(2, 3), C(0, 4) and D(5, 0), decide if AB and CD are parallel, perpendicular or neither. =Neither 2.)Given the equations y = 1x + 7 and y = 3x - 2, decide whether the lines are parallel, perpendicular or neither. =neither 3.) Given the equations y...
June 9, 2010 by Ariel

Precalculus check answers help!
16. Find the distance between P (–2, 5) and the line with equation x – 3y + 4 = 0. (1 point) 17(sqrt10)/ 10 0 -17(sqrt10)/ 10 13(sqrt10)/ 10 ~ 17. Find the distance between the lines with equations 5x + 12y = 12 and y = –x + 3. (1 point) 24/13 ~ 48/13 -48/13 48/17 18. Find an ...
May 30, 2012 by Kelsey

Precalculus check answers help!
16. Find the distance between P (–2, 5) and the line with equation x – 3y + 4 = 0. (1 point) 17(sqrt10)/ 10 0 -17(sqrt10)/ 10 13(sqrt10)/ 10 ~ 17. Find the distance between the lines with equations 5x + 12y = 12 and y = –x + 3. (1 point) 24/13 ~ 48/13 -48/13 48/17 18. Find an ...
May 31, 2012 by Kelsey

Algerbra
solve for x ac+x=xy have all terms with x on one side ac=xy-x take x as common factor ac=x(y-1) now solve for x 25a^2 - 9b^4 can u please help me solve and check these equations
September 26, 2006 by Mark

chemistry
balance the equations 1)Mg3N2+N2+H2O=Mg(OH)2+NH3 2)KMnO4+H2S+H2SO4=KHSO4+H2O+MnSO4 3)AS2O3+SnCl2+HCL=SnCl4+AS+H2O
June 22, 2013 by vishal

stats
The Title I coordinator for the district has been tasked with developing a plan to test two new intensive remediation programs for students with dyscalculia (like dyslexia, only numbers are the problem, rather than words!). The students are 60 8th graders at a magnet school ...
March 1, 2009 by ash

stats ?
The Title I coordinator for the district has been tasked with developing a plan to test two new intensive remediation programs for students with dyscalculia (like dyslexia, only numbers are the problem, rather than words!). The students are 60 8th graders at a magnet school ...
March 2, 2009 by ash

mathematics
Angles 1 and 7 are alternate exterior angles of a transversal cutting two parallel lines. If m(angle1)=4x+10 and m(angle7)=6x+4, what are the measures of angles 1 and 7? Give a property of angles that helped you solve the problem. What's confusing me about this problem is the ...
February 10, 2010 by nicole

Mathematics
what is (5 3/5 divided by 1 5/9) - (1 1/5) squared? what is (five and three over five divided by one and five over nine) minus (one and one over five) squared? the answer is suppose to be 2 4/25 (two and four over twenty-five) but I'm not sure how to work out the second part ...
October 1, 2009 by kerry-ann

math
In mathematics class, 30 students received an A on the third test, which is 125% of the students who received an A on the second test. How many students received an A on the second test?
October 5, 2014 by ashley

Math
Determine whether the situation requires an exact calculation or an estimate. Explain. This week, the Laketown Cruise Company took its boat on 19 cruises, carrying the boat's full capacity of 38 guests on each cruise. Was this week's total guest count smaller than last week's ...
October 20, 2009 by Anonymous

Finite Mathematics
Jessica wants to accumulate $14,000 by the end of 5 yr in a special bank account, which she had opened for this purpose. To achieve this goal, Jessica plans to deposit a fixed sum of money into the account at the end of the month over the 5-yr period. If the bank pays interest...
February 7, 2011 by Salvany

Mathematics
1. Show that Sin3 Theta - Cos2 Theta = (1 - Sin Theta)(4Sin^2 Theta + 2Sin Theta - 1). Without using a calculator, show that Theta = 18 degrees is an exact solution of the equation Sin3 Theta = Cos2 Theta. Justifying your answer, find the exact values of: i) Sin18 degrees. ii...
August 3, 2011 by Edwards

physics
A 10 kg monkey climbs up a massless rope that runs over a frictionless tree limv and back down to a 15kg package on the ground. a) what is teh magnitude of the least acceleration the monkey muct have if it is to ligt teh package off the ground? If after the packafe has been ...
November 21, 2006 by Bri

Math
Kosuke wrote a mathematics contest consistingof 25 multiple choice questions, the scoring system gave 6 points for a correct answer, 2 points for not answering, and 1 point for an incorrect answer.Kosuke got x correct and left y unanswered questions a) write an expression for ...
October 9, 2011 by Nancy

Mathematics
The graph of y = 2^x-3 can be obtained by shifting the graph of y= 2^x a) 3 units to the right b) 3 units to the left c) 3 units up d) 3 units down e) 2 units to the right and 3 units up The equation of the graph that is obtained by reflecting the graph of y = 3^-x in the y ...
August 5, 2012 by Willie

ALGEBRA
The profit made from the sale of tiles is found by subtracting the costs from the revenue. e. Find the Profit Equation by substituting your equations for R and C in the equation . Simplify the equation. f. What is the profit made from selling 20 tile sets per month? g. What is...
June 23, 2011 by AMERICAN GIRL

math
In each case, consider what you know about the distribution and then explain why you would expect it to be or not to be normally distributed. a. The wealth of the parents of students attending your school b. The values that a group of fourth-grade students would give for the ...
August 11, 2009 by Anonymous

Mathematics
A solution is mixed with a 12% acid solution to form a 16% acid solution. How many liters of the 20% acid solution are used to make 10 liters of the 16% acid solution?
February 24, 2010 by Matthew

mathematics (percentages)
math problem: pedro wants to calculate his gpa. he has the lab grades:90/100,98/100,90/100,94/100,90/100,90/100,95/100,98/100. Labs are worth 20%. He has the test grades: 9/10,6/10,10/10,10/10,5/10,7/10,7/10,7/10,10/10,10/10,8/10,10/10. Homework is worth 20% test grades are: ...
December 5, 2006 by day

Mathematics (probability)
A bag contains 3 red and 5 white toys. Rose picked two toys one after the other. Draw a probability tree. Find the probability that Rose gets two red toys. You can use Microsoft Word to draw a probability tree.
May 16, 2013 by arzam

alg.
solve and graph 2x-y=4 2x-y=6 would this be x=2+0.5y x=3+0.5y and then graph as that??????? not really sure what i am doing here Put both equations in the form of y=mx +b Then observe that the slope is the same, the lines are parallel, and have no common solution.
May 20, 2007 by clueless

science equations
my grand daughter is having a awful time with this and i can't help her but if you would explain it to me maybe i can help here goes a skier with a mass of 48kg moves with a velocity of 11.45 m/s east. what is the skier's momentum p=mxv.
January 24, 2008 by summer

precalculus
i need help with homework which is due tommorow determine algebraically whether the graph of the given equation is symmetric to the y axis the x axis or the origin the equations are 5y=7x^2-2x can u show work please thanks in advance
February 21, 2010 by HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Pre-calc
Heres the equation: (x^2)-(4y^2)-(4x)+(24y)-(36)=0 Your supposed to find the coordinates of the center, foci, and vertices, and the equations of the asymptotes of its graph. So first you complete the square right? (x^2 -4x+4)-4(y^2 +6y+9)=36+4+36 [((x+2)^2)/76] -[(y+3)^2)/19]=...
April 29, 2012 by Maya

matt/116
Will someone please help me find the answer to this question please. How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.
February 12, 2013 by Sade C

Chemistry
When silver-107 is bombarded with a neutron, a different isotope of silver forms and then undergoes beta decay. What is the final product? (My Hints: Write two separate nuclear equations.)
March 1, 2013 by Michelle

math
Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.
April 23, 2013 by Anonymous

math
Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.
April 23, 2013 by Anonymous

math
Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.
April 23, 2013 by Anonymous

math
Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.
May 3, 2013 by bryant

math
What is the length of the midsegment of the trapezoid made by the vertices A(0, 5), B(3, 3), C(5, -2) and D(-1, 2). Show equations and all work that leads to your answer. Answer Skip text editor options Collapse: Formatting Toolbar
November 21, 2013 by shianne

Chemistry
A sample of nitrogen occupies a volume of 300ml under a pressure of 380 torr at -177C. What would be the volume at STP? I know the answer is 430mL but I don't know which equations to use to formulate the calculation.
May 1, 2014 by n

physics
Solve the equations 1 2 mv2 + 1 2 Iω2 = mgh and v = rω for the speed v using substitution, given that I = mr2 and h = 4.20 m. (Note that mass m and radius r will both cancel, so their numerical values aren't required.)
March 6, 2015 by alba

AP physics
Solve the equations 1/2mv2 + 1/2Iω2 = mgh and v = rω for the speed v using substitution, given that I = mr2 and h = 4.20 m. (Note that mass m and radius r will both cancel, so their numerical values aren't required.) m/s
March 6, 2015 by Amar

Mathematics : Arithmetic Sequence
The 5th term and the 8th term of an arithmetic sequence are 18 and 27 respctively. a)Find the 1st term and the common difference of the arithmetic sequence. b)Find the general term of the arithmetic sequence.
September 7, 2008 by Charmian

Math
I have been asked to solve the following system of linear inequalities by graphing. I tried replacing with various numbers but even though the they work in the equations my graphs change from consistent to inconsistent. Please help.
May 26, 2007 by Aman

physics
determine the stopping distances for an auto0mobile with the initial speed of 90km/hand the human reaction time of 1.0s: (a) for an acceleration a= -40m/s^2; (b) for a = -8.0m/s^2 use one of newtons four equations to solve.... i dont get this at all...PLEASE HELP!!
July 19, 2008 by marina

science
Calculate the amount (volume) of 6.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 150 mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation. Any help is appreciatede.
January 31, 2010 by Jander

Chemistry
Calculate the average kinetic energy of the N2 molecules in a sample of N2 gas at 273K and 546K. I have been able to come up with the equation (KE)avg=3/2RT. I just want to know if R is equal to 0.08206 as it would be in other equations.
July 11, 2010 by Victoria

organic chemistry--please help me!!!
Give equations to show how sulfuric acid can convert 4-methylcyclohexene into a mixture of four isomeric c7H12 compounds(including starting material). Predict the relative amounts of each isomer.
October 31, 2011 by Vivian

um reviewing old subjects .. Linear Equations
Math.. and i dont understand this... plz go throw steps w me.. Like ex: 2 complementary angles a 24 degrees different. How much does each angle measure? Equation1: Equation: Method1: Method2:
April 29, 2013 by Kennedy

Algebra2
Help Solving This? 1.√3-x = 2-√x+1 2.2√n + 3 = n 5 Rational Exponet Equations: 1.3x^5/2 - 9 = 0 2.(2x+3)^1/4=4
August 21, 2012 by Unknown

Algebra2
Help Solving This? 1. √x+4 = √x-1+1 2.2√n + 3 = n 5 Rational Exponet Equations: 1.3x^5/2 - 9 = 0 2.(2x+3)^1/4=4
August 22, 2012 by Victor

math help
5) Consider the equations: f(X)= -6x-1 and g(x)=4x^2 Select the solution for (f+g)(x). a) -6x -1 + 4x^2 b) -24x^3 - 4x^2 c) -24x^2 - 1 d) -6x - 1- 24x^2
March 31, 2013 by Anonymous

maths- commercial mathematics(value added tax)
A shopkeeper sells an article at the listed price of Rs.1500 and the rate of value added tax is 12% at every stage of sale. If the shopkeeper pays a Value added tax of Rs. 36 to the Government, what was the price, inclusive of Tax, at which the shopkeeper purchased the article...
March 7, 2013 by anoynomous

physics
Madhuri throws a stone the stone is thrown horizontally at 33.9 m/s from the top of a 297.9m cliff. 1.How high is the stone after 3.35 sec? 2.What is the range? equations to find please.
October 5, 2010 by Bansnoob

math-calculus
solving equations with two absolute value brackets |x+4| = |x-2| so i want to know how to do this? do i always have to write out the four piecewise possibilities? that be ++ -+ and +- ++ x+4 = x-2 4 = -2 not solution -+ -(x+4) = x-2 -x-4 = x-2 -4 = 2x-2 -1 = x solution +- x+4...
January 18, 2012 by Shreya

Algebra
How do you know which rule to use when it doesn't specify? All it says is find the derivative of the function. I haven't had algebra/calculus in over 20 years, I'm completely lost. Please help
February 19, 2015 by Averi

Algebra/Pre-calculus (Quadratic Equations)
A theatre company allows a group of 10 people to buy theatre tickets at a price of $28 per person. For each person in excess of 10, the price is decreased by $2 per person for everyone down to a minimum of $10 per person. What number of people will produce the maximum revenue ...
October 17, 2014 by Mathgirl730

Algebra II
I first want to make it clear that I have only taken Geometry, Algebra I, and pre-Algebra. That seemed to clear things up last time. Question: Matt bought a car at the cost of 25,000 dollars. This car's value goes down 15% every year. 1. What is the decay factor? 2. Write the ...
March 17, 2011 by Anon

for Drbob222
thanks but i do need help to solve the third part also, I did get these equations but don't know how to put them together to solve the third. thanks for helping further!
October 29, 2007 by Gavin

simple equations ( math)
Divide 300 cards between Ann and Elizabeth so that Ann has 5 times as many as Elizebeth's cards
January 10, 2010 by vanessa

banyan elementary
Samantha has 7 tomato plants in 12 rows. How many tomato plants does she have? Solve using multiplication equations
January 19, 2011 by maya

Chemistry
17. You have the following equations: 2S (s) + 3O2 (g) 2SO3 (g), H = 792 kJ 2S (s) + 2O2 (g) 2SO2 (g), H = ? 2SO2 (g) + O2 (g) 2SO3 (g), H = 198 kJ What is the missing H?
April 10, 2012 by JoJo

Differential Equations
solve using variation of parameters: y"+36y=[csc(6t)]^2 I don't understand variation of parameters very well at all.
April 24, 2012 by Rosy

Physics(Please check)
Which equations are dimensionally correct? F=ma E=max X=(1/2)at^3 V=sqrt(2*fx/m) E=(1/2)mv I think that F=ma , E=(1/2)at^3, V=sqrt(2*fx/m) are correct. Would you agree?
May 21, 2012 by Hannah

precalculus
Find all solutions of the system of equations. Order your answers from smallest to largest x, then from smallest to largest y.) x^2 + y2= 53 x2− y2= 3
December 1, 2012 by amaa

Math
38. Tell whether the lines for the pair of equations are parallel, perpendicular, or neither. y = –2/3x + 1 2x – 3y = –3 A.)Parallel B.)Perpendicular C.)Niether I think it is C.
December 17, 2012 by Deborah

math
Brent has #3.35 in quarters and dimes. He has 23 coins in all. How many quarters and dimes does he have? Write a system of equations to solve
February 11, 2013 by Brenna

AP Calculus BC
A curtate cycloid is defined by the equations x = 2t - sin t and y = t - cos t. If I walk along the cycloid, how far will I walk in 10 seconds?
February 26, 2013 by Marcia

math
a,b and c are positive integers such that the simultaneous equations (a−2b)x=1, (b−2c)x=1 and x+25=c have a positive solution for x. What is the minimum value of a?
April 24, 2013 by ayan

Math
When solving a system of equations, how do you determine which method to use? Like how can you determine when to use Elimination, Substitution or Graphing???
December 14, 2013 by Gabby

Calculus Help Please!!!
--- Find the slope m of the tangent to the curve y = 4 + 4x^2 − 2x^3 at the point where x = a. ---- Find equations of the tangent lines at the points (1,6) and (2,4). (1,6) Y(x)= (2,4) Y(x)=
March 7, 2014 by Kesha

Pre-Calculus/Trigonometry
give an example of an arithmetic sequence also give an example of a system of equations with no solutions
September 29, 2014 by Anonymous

Math-Linear Equations
True or false? A line perpendicular to a line whose slope is -0.75 has a slope of 1.3 repeating. Please help me with this.Thank you
January 2, 2015 by Cherie

simple equations ( math)
Mary has $38 and Jane has $12. How much must Mary give Jane so that they both have the same amount>?
January 10, 2010 by vanessa

Math
Use elimination to solve each system of equations. x+y-2z=10 8x-9y-z=5 3x+4y+2z=-10 I need to figure out what x,y, and z each equal. I must use the elimination method.
January 11, 2010 by Karli

Chemistry
Balance each of the following skeleton equations. This is the last one left to balance. D) C4H10 + O2 -> CO2 + H2O = C4H10 + O2 -> 4CO2 + 10H
July 11, 2010 by Derrick

computer science
. Investigate the values of  and  such that the system of equations x + y + z = 6 x + 2y + 3z = 10 x + 2y + z = , may have (i) Unique solution
November 16, 2010 by sonia

math
How would you set up a system of linear equations to find out how many packages of 8 and 12 you would have to buy to have no left?
January 11, 2011 by Chuck

Math: Linear Equations
What is "3x=9" in y=mx+b form, and what is its slope, y-intercept, and x-intercept? [i think that its x-intercept is (3,0), but i'm not sure about any of the others] Also, what is the x-intercept of "2y+16=0"? [is it "none"?]
December 15, 2011 by Cicilia

Math: Linear Equations
What is "3x=9" in y=mx+b form, and what is its slope, y-intercept, and x-intercept? [i think that its x-intercept is (3,0), but i'm not sure about any of the others] Also, what is the x-intercept of "2y+16=0"? [is it "none"?]
December 15, 2011 by Cicilia

finite math
Determine whether each system of linear equations has a)one and only one solution, b)infinitely many solutions, or c) no solution 2x-4y=5 3x +2y=6
April 3, 2012 by bob

Chemisty
Write all possible quilibrium equations for KHP dissovled in water and then write the quilibrium constanst expressions for the equation.
May 9, 2012 by Brooke

College Math
Using EZgraph, graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph. 3. 4.9x – 7.2y = 2.3 4. 2x = -8 5. 3.7x + 4.2y = 5.03
October 19, 2012 by Richard D

Chemis
Write a blanaced molecular equation for the reaction 2Na(NO3) + Cu(OH)2. Write complete ionic and net ionic equations?
October 29, 2012 by alexis

Chemistry
Write a blanaced molecular equation for the reaction 2Na(NO3) + Cu(OH)2. Write complete ionic and net ionic equations?
October 29, 2012 by alexis

AP Calculus
Two circles of radius 4 are tangent to the graph of y^2=4x at the point (1,2). Find equations of these two circles. I found the derivative of y^2=4x, but i don't know what to do next!
September 11, 2013 by Sarah

Math
Solve the following equations for the variable indicated. Please correct me if I'm wrong! 1. I=Prt for P Answer: I/P=rt 2. Solve C= 2ğr for r. Answer: C/r=2ğ
August 31, 2014 by Anonymous

math,help
How do even solve this one sum of two numbers is 32. their difference is 6. what are the numbers? x-y=6 x+y=32 add the equations... 2x=38 and solve.
February 10, 2007 by jasmine20

math ,correction
Solve each of the following equations for x. Problem#3 (5)/(x+6) + (2)/(x^2+7x+6) = (3)/(x+1) My answer is: x = 5 Problem #4 (2)/(5)= (x-2)/(20) My answer is: 10=x whoa. good luck. =0
March 7, 2007 by jas20

Exponential Equations
HOw would you solve this equation 5^x+6=4 Correct me if I'm wrong so far.. x+6 ln5=4 Divide by x+6..which would be ln5=4/x+6...then what??
May 1, 2009 by Amber

simple equations ( math)
Tom's weight is 3/4 of Peter's. If Tom weighs 36kg, find the weight of Peters
January 10, 2010 by vanessa

simple equations ( math)
Share $100 between Joseph and Peter so that Joseph has 3 times as much as Peter.
January 10, 2010 by vanessa

physics
Using dimensional analysis, which one of the following equations is dimensionally correct? ( a → m/s2, v → m/s, x → m , t → s)
September 17, 2010 by Kelly

acc. alg 2
exponentiating to solve equations: solve the eaquation, cheack for extraneous solutions log5(x+4)+log5(x+1)=2
March 20, 2011 by Kayla

Calculus
Find the turning points of y = 3 x 3 + 6 x 2 + 3 x – 1 and determine their nature, also, find the equations of the tangents at these points. please help me
December 25, 2011 by Noor

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