Thursday

April 24, 2014

April 24, 2014

Number of results: 72,228

**math plz help**

please can someone help me do this problem. atleast help me find an equation to start with thank you. each page in a children's picture book has area 58 squared inches and a left side margin of 1.5 inches and top,bottom and right side margins of 0.5 inches. Find the dimensions...
*Tuesday, January 23, 2007 at 6:56pm by britteny*

**maths equations**

could you please help me on this equation r = sx2/2t im really stuck Your non-use of parenthesis makes in difficult to know what the equation is. What are you trying to do with the equation? sorry im trying to make x the subject divide each side by s r/s= x^2 /2t multiply each...
*Sunday, May 13, 2007 at 2:35pm by bex*

**calculus**

Question 1: Experimentally it is found that a 6 kg weight stretches a certain spring 6 cm. If the weight is pulled 4 cm below the equilibrium position and released: a. Set up the differential equation and associated conditions describing the motion. b. Find the position of the...
*Thursday, March 10, 2011 at 10:03pm by shasha*

**Calculus 2**

how do I find the fluid force of a vertical semicircle that has been divided into three equal sectors of 60 degrees each. I know what the equation to find the fluid force for the whole semicircle is. but how do I find L(y) for each semicircle.
*Thursday, October 11, 2012 at 6:33pm by Laura*

**ALgebra**

find an equation of the line containing, (4,-2) and parallel to the line containing (-1,4) and (2,-3) find an equation of the line containing (-1, 3) and perpendicular to the line containing (3,-5) and (-2,7)
*Tuesday, October 19, 2010 at 6:10pm by jose*

**calc**

a circle is tangent to the y-axis at y=3 and has one x-intercept at x=1 1. determine the other x-intercept 2. find an equation for the circle so i know two points on the circle are (0,3) and (1,0) and the equation for a circle is (x-a)^2 + (y-b)^2 = r^2 but i don't know how to...
*Saturday, September 1, 2007 at 5:07pm by sammy*

**Calculus**

Find the slope of the functions graph at a given point. Then find an equation for the line tangent to the graph there. f(x)=2*square root of x. (1,2) Could someone please help me figure this one out?
*Sunday, July 21, 2013 at 6:24pm by Jess*

**cal**

find the equation of a quadratic function whose graph is tangent at x=1 to the line whose slope8, tangent at x=-2 to solve the line with slope-4 and tangent to the line y=-8 find the equation of the tangent lines at x=1 and x=-2 graph the quadratic function obtained and the 3 ...
*Monday, February 28, 2011 at 11:52pm by erika*

**math**

Can someone please help me on these I have look at the examples and done just what they did, but I still get it wrong and I only have one more time to try. Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9...
*Sunday, June 23, 2013 at 8:57pm by tracy12*

**math/algebra**

Can someone help me with this problem....5x/7-6x/5=3/35 find the common denominator for the left side You should get it to be 35 multiply both the numerator and the denominator by the number that makes each fraction have a denominaor of 35 After this Multiply the whole ...
*Sunday, August 19, 2007 at 7:41pm by ms jay*

**maths**

I've to create a scatter plot using the following coordinates: (0,15.0), (1000,13.0), (2000,11.0), (3000,9.1) and (4000,7.1) using these points i have to find a prediction equation. thus, i used the points (1000,13.0) and (3000,9.1) the equation i found was y = -0.00195x + 14....
*Tuesday, February 9, 2010 at 7:02am by bindiya farswani*

**Geometry**

I have several questions, because my geometry final is tomorrow. I've completed most of the review, but can't seem to figure out these questions. It would be great if someone could tell me how to solve each equation. 1. Find the radius of the circle with the given measurement...
*Tuesday, June 17, 2008 at 9:53pm by Sammie*

**math**

Ellipses question: x^2/25 + y^2/169=1? 1. state lengths of major & minor axes 2. state the x-inter and y-inter 3. find coordinates of the foci 4. find the points of intersection with line y=1-2x 5. graph 6. find the equation of the ellipse after it is translated accoring to[(x...
*Thursday, April 24, 2008 at 1:47pm by amanda.p.*

**maths**

I've to solve the following absolute value equation 8|w-7|=72. I solved the equation and the answers I got were -2 and 16. However the problem is that when I'm checking the equation with the answers it's not coming right. I.E. 8|16-7|=72 8|9| = 72 8(9)= 72 72 = 72 (which is ...
*Saturday, January 30, 2010 at 3:09am by bindiya farswani*

**chemistry**

We are determining the molarity of HCl by titration of HCl. What would be the complete equation and the net ionic equation? THanks What are you titrating it with? Won't that make a difference in the equation we write? It's titration of HCl with NaOH. molecular equation: HCl + ...
*Sunday, September 17, 2006 at 4:00pm by bria*

**Quadratic Equations and Functions**

I started having trouble on part (c), and I need to know this before I can go onto the other problems. Plz help! The parabola shown at the right (no picture, sorry) is of the form y=x^2+bx+c. The graph's y-intercept is (0,2), the axis of symmetry is -2.5 and the two points ...
*Sunday, February 4, 2007 at 11:21pm by Emily*

**math-calculus**

Hi i've been struggling over this question for a while. Can anybody help me with this? A body's velocity at the time t sec is v = 2t^3 - 9t^2 +12t - 5 m/sec. Find the body's speed each time the acceleration is zero. ________________________________ What i have been doing is ...
*Monday, October 1, 2007 at 2:23pm by manny*

**math**

Find the dimensions of a rectangle with perimeter 40 with the largest area. (hint: Find an equation for area and one for perimeter, use both to find perimeter in terms of one variable)
*Tuesday, March 20, 2012 at 3:18am by Jordan*

**Algebra**

Solve the equation identify as an identity, an inconsistent equation or a conditional. My equation is 1-3/2x+7/4 I know the answer is Conditional {-2}, but I cannot figure out how to get it or even where to start.
*Saturday, March 22, 2008 at 10:56pm by Tim*

**Algebra HELP!**

Solve the equation identify as an identity, an inconsistent equation or a conditional. My equation is 1-3/2x+7/4 I know the answer is Conditional {-2}, but I cannot figure out how to get it or even where to start.
*Sunday, March 23, 2008 at 1:58pm by Tim*

**alegebra**

solve the sytem of equation by graphing. Then classify the system as consistent or inconsistent and the equation as dependent or independent. y=-x-11 3x-2y=2 what is the solution of the system of equation.,
*Sunday, March 23, 2008 at 5:32pm by anaya*

**chemistry**

write the balanced molecular equation, the complete ionic equation and the net ionic equation. copper(2) sulfate and 10% sodium hydroxide
*Tuesday, April 12, 2011 at 12:37am by Anonymous07*

**Chemistry**

Write the molecular equation, the complete ionic equation, and the net ionic equation for the reaction of barium hydroxide with sodium nitrate.
*Wednesday, November 23, 2011 at 9:13pm by Jane*

**ALGEBRA 2**

Sheila needs to determine the equation of a line passing through the point (6, 2) that is perpendicular to y = 2x 4. Which equation best represents Sheila's equation?
*Thursday, January 12, 2012 at 6:29pm by KELR*

**Precalculus**

Consider the equation 7sin^2x - (4sin2^x)/cosx = -1 a) Put the equation in standard quadratic trig equation form. Why is it 7sin^2x - 8sinx + 1 =0?
*Friday, January 27, 2012 at 8:21pm by Melissa*

**math**

x+y= 30 4x+2y=74 y+ What does the y+ signify? Are you supposed to solve for y? Try doubling the first equation, giving you 2x + 2y = 60 and then subracting the second equation from that. -2x = -14 Solve that easily for x, and then substitute that x in any equation to get y.
*Wednesday, March 7, 2007 at 2:07pm by JOHN*

**college**

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2 + bx + c =0 The solutions are -10, 3 The equation is blank = 0
*Friday, September 4, 2009 at 7:39pm by Dana*

**pre-algebra**

Explain the basic method(steps) for graphing a linear equation. Can you give an example of a linear equation and show me how to graph the equation?
*Saturday, November 19, 2011 at 3:30am by Sherrie*

**Trigonometry**

Given the equation 2cos^2x+sinx-1=0 1. Explain why this equation cannot be factored. 2. Use a trigonometric identity to change the equation into one that can be factored.
*Sunday, November 24, 2013 at 4:13pm by Jessy*

**Algebra**

Please help to find x, y 1. 8x-y=17 6x+y=11 2. 5x-2y=17 2x+3y=3 Question no.1 8x-y=17 6x+y=11 (adding the equation) __________ (-y and +y will be 0) 14x =28 Taking variables to one side x=28 __ 14 14*2=28 therefore x=2 substitute this value of x in equation 2 6x+y=11 6*2+y=11 ...
*Friday, May 18, 2007 at 10:38am by Tamia*

**algebra**

Market research has shown that at a price of $230, 100 number of plasma TVs are sold and if the price is reduced to $190, then 200 number of TVs are sold. Find the equation that represents this demand curve and state in the form of p=mx+b (Slope Intercept Form of a Linear ...
*Sunday, December 19, 2010 at 8:37pm by Crystal*

**Statistics**

The ages (in years) of 10 infants and the number of hours each slept in a day Age, x: 0.1, 0.2, 0.4, 0.7, 0.6, 0.9, 0.1, 0.2, 0.4, 0.9 Hours slept, y: 14.9, 14.5, 13.9, 14.1, 13.9, 13.7, 14.3, 13.9, 14.0, 14.1 Find the equation of the regression line. Then use the regression ...
*Wednesday, April 4, 2012 at 4:57pm by Amanda*

**math, algebra**

How do I solve for the following: Directions solve each literal equation for the individual variable. 2x + 3y -6 (for x ) Linear equation It has to equal something. What you have is a statement, not an equation.
*Tuesday, December 19, 2006 at 12:20am by jasmine20*

**alg. **

Find the coordinates of the vertex and the equation of the axis of symmetry of the parabola with the given equation. y = 8x2 + 48x − 3 vertex (x, y) = _____________ axis of symmetry _____________
*Monday, April 21, 2014 at 8:17am by KMILLhelp*

**Algebra**

I am re posting this for fear that it was overlooked earlier. I have also decided to show my work in the hopes of preventing any issues that might arise. Solve the absolute value equation. I y+3 I +5=2y Would the solutions be 8=y and y=2/3? Subtract 5 from both sides. I y+3 I...
*Tuesday, October 13, 2009 at 6:27pm by Anonymous*

**algebra**

Can you explain to me how I have the answer put how do I find out how to find the right answer the question is what is an equation of the line in slope intercept form answers are y=2 x-2, y=-2 x-2, y=-2 x+2, y=2 x+2 want to know how to do them. Got to draw a picture
*Tuesday, March 4, 2014 at 9:08pm by snow*

**calculus**

Xan you please tell me how you find the rate of change of Y= the square root of X when Y is increasing at 2 units per second and X=1? y= √x you are given dy/dt = 2 units/sec when x=1 I assume you want dx/dt, that is, how fast is x changing at that moment. from your ...
*Sunday, July 29, 2007 at 12:06pm by john*

**Chemistry**

Use Hess's Law to find the change in heat of 2C(graphite)+H2(g)-->C2H2(g)? Given: C(graphite) + O2(g) --> CO2(g) change of heat rxn = -393.5 kJ 2H2 (g) + O2(g) ---> 2H2O (l) change of heat rxn = -571.6 kJ 2C2H2 (g) +5O2(g) ----> 4CO2(g) +2H2O (l) change of heat rxn...
*Sunday, May 5, 2013 at 10:54pm by Lauren*

**maths**

1x+2y=5 3x+7y=18 x= y= Multiply equation 1 by -3, add to equation 2 (which eliminates x), then solve for y. Use that value in the other equation to solve for x. Post your work if you get stuck AND explain in detail what you don't understand.
*Tuesday, February 6, 2007 at 2:56pm by Anonymous*

**Chemistry**

What is the overall equation, the complete ionic equation, and the net ionic equation for the reaction that occurs when aqueous solutions of cobalt (II) bromide and sodium hydroxide are mixed?
*Monday, March 21, 2011 at 5:39pm by Shay*

**Math**

Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: w=Cr^-2 , where C is a constant...
*Friday, September 17, 2010 at 10:02am by ASD*

**Algerba**

Find slope and y-intercept of following equation y=-3 x -2 knowing the slope of intercept 5 formula is y=mx+b slope is m or -3 y=-3 or m (0) -2 m=slope 5 5 y-intercept = let x=o solve for y y=0-2 y=-2 You can tell by inspecting the equation in the y = mx + b form that the ...
*Wednesday, February 28, 2007 at 12:51am by Trusthim2*

**math plz help**

Task 2: Use the table to complete each part. a. Copy the table. Extend the table by writing expressions for y when x = 5, 6, and 7. b. Simplify each expression for y in the table from part (a). What pattern do you notice in the simplified expressions? c. Write an equation that...
*Monday, August 26, 2013 at 8:57pm by electroShark797*

**MATH**

Differential equations, initial value problem. The general equation of motion is: mx"+Bx'+kx=f(t), where the independent variable is t, and the displacement x is the dependent variable. In this case, external force f(t)=0, so mx"+Bx'+kx=0 substitute m=0.25, k=4, B=1 we have a ...
*Wednesday, March 16, 2011 at 1:54pm by Anonymous*

**Calculus help**

\documentclass{article} \usepackage{amssymb,amsmath,amscd,concmath} \pagestyle{empty} \begin{document} \begin{equation*}\int_{1}^{3} [(e^3/x)/(x^2)]\, dx\end{equation*} \end{document} Sorry,the html format does not work... How to find the integral of [e^(3/x)]/(x^2) from 1 to ...
*Tuesday, February 20, 2007 at 7:42pm by Linda*

**Physics equation?**

can anybody tell me an equation that can be used to find the number of electrons flowing through an LED every second? and also refer or give me any information that could explain another mechanism (apart from the fact that they denote energy to a single photon of light) by ...
*Monday, February 11, 2008 at 9:53pm by AllyKat*

**equations**

decide whether each equation is true or false.For each true equation,write the number property shown by the equation.0+6=6
*Tuesday, September 4, 2012 at 7:57pm by isaac*

**Precalc**

Find the values of x between (or equal to) 0 and 360 degrees to satisfy each equation. arcsin1/2=x I got 30 degrees as one angle, but how do I find the second one? arccot1=x Is the answer 45 degrees? Also, Find each value: arccos(-1/2) and sin(2 sin^-1 1/2) Thanks in advance. ...
*Wednesday, February 13, 2008 at 5:34pm by George*

**Math (repost)**

Let f and g be defined by f(x) = 9-x such that 4<x<8 g(x) = x+2 such that 1<x<5 [the "<" signs are less than or equal to] Find the domains of both f o g and g o f algebraically. Find the range of f o g algebraically. I got the equation for f(g(x)), which is 7-x...
*Saturday, September 5, 2009 at 4:33pm by anonymous*

**Calculus**

Let f(x)=3x^4-2x^2+3 a) find f'(x) Answer: f'(x)=12x^3-4x b) find the slope of the line tangent to the graph of f at x=3. Answer:312 So I got those firs two right but what I need help with is part C which is c) find an equation of the line tangent to the graph of f at x=3
*Friday, January 25, 2013 at 3:36pm by Anonymous*

**Algebra**

Need help with two questions. I've been stuck on them for a while now. 1) Find a general form of an equation of the line through the point A that satisfies the given condition. A(−2, 5) slope 3/4 2)Find a general form of an equation of the line through the point A that ...
*Monday, February 25, 2013 at 6:58pm by Jim*

**Calculus**

Find the outside and inside functions of the following to find their derivatives: 1) sqrt(2x+9) 2) cos(cos(x)) 3) tan(x) I already know how to find their derivatives I'm just not exactly sure what parts of the chain rule equation would be considered the outside and inside.
*Tuesday, June 18, 2013 at 2:41pm by Robin*

**Algebra**

how to solve this: what is the largest rectangular area that can be enclosed with 400 ft of fencing? What are the dimensions of the rectangle? Could someone write the equation. I know how to solve it without an equation but I want to know the equation. would it be a quadratic?
*Sunday, November 7, 2010 at 12:11pm by Amy*

**college**

Answer the problems below and show or explain how you arrived at your final answer. 1. You sell premium toasters and are making a pricing decision. At a price of $100 (or p = $100) you predict that you can sell 30 of these premium toasters at your Scottsdale, Arizona ...
*Tuesday, April 13, 2010 at 12:48am by jj*

**Math**

Let f and g be defined by f(x) = 9-x such that 4<x<8 g(x) = x+2 such that 1<x<5 [the "<" signs are less than or equal to] Find the domains of both f o g and g o f algebraically. Find the range of f o g algebraically. I got the equation for f(g(x)), which is 7-x...
*Saturday, September 5, 2009 at 1:30pm by anonymous*

**Calc 3**

A cooling tower for a nuclear reactor is to be constructed in the shape of a hyperboloid of one sheet. The diameter at the base is 300 m and the minimum diameter, 500 m above the base, is 200 m. Find an equation describing the shape of the tower in the coordinates where the ...
*Wednesday, September 12, 2012 at 7:02pm by Becky*

**math**

Suppose that a market research company finds that at a price of p=$25, they would sell x= 53 tiles each month. If they lower the price to p=$15, then more people will purchase the tile, and they can expect to sell x = 63 tiles months time. Find the equation of the line for ...
*Saturday, November 27, 2010 at 11:35pm by Anonymous*

**algbra 1b**

can someone tell me if i have the answer correct a. Suppose a market research company finds that at a price of p = $40, they would sell x = 27 tiles each month. If they lower the price to p = $15, then more people would purchase the tile, and they can expect to sell x = 47 ...
*Saturday, May 12, 2012 at 12:20pm by nell*

**math**

If cos(3 x)614 x e^2 y=0, find [ dy/dx] using implicit differentiation. In this problem, you should differentiate both sides of this equation with respect to x. First, using implicit differentiation, differentiate the left side of the equation with respect to x, and express ...
*Sunday, September 30, 2012 at 4:25pm by Zhao*

**Precalculus**

I'm sorry I'm posting so many questions, I promise this is the last one tonight :) The leading coefficient of a cubic polynomial P is 2, and the coefficient of the linear term is -5. If P(0)=7 and P(2)=21, find P(3). I DO NOT understand how to even start this one. I thought as...
*Tuesday, September 1, 2009 at 9:44pm by Emily*

**algebra**

find sales tax in your area --(6%). using tax rate, write a linear equation representing the total with tax for a purchase of x dollars. Using this equation to dtermine what the pretax cost of the item is if the total cost is $10.
*Thursday, May 13, 2010 at 9:51pm by sally*

**Grade 12 Calculus **

solve cosx= (squareroot3)/ 2 where 0 <(with a line underneath) x <(with a line underneath) 2 pie a) how many solutions are possible? b) in which quadrants would you find the solutions? c) determine the related angle for the equation. d) determine all the solutions for ...
*Saturday, May 11, 2013 at 11:43pm by Maria*

**math**

Alexandra has 18 yo-yos.She spent $9.00 to buy them all.She wrote the equation 18 divided by 9 = y to find how many yo-yos she got for each dollar she spent.Sven has 9 yo-yos.He spent $18.00 to buy them all.He wrote the equation 18 divided by 9 = y.What does Sven's equation ...
*Thursday, February 16, 2012 at 8:01pm by bebe*

**Math**

Alexandra has 18 yo-yos. She spent $9.00 to buy them all. She wrote the equation 18 divided 9 = y to find how many yo-yos she got for each dollar she spent. Sven has 9 yo-yos. He spent $18.00 to buy them all. He wrote the equation 18 divided 9 = y . What does Sven's equation ...
*Wednesday, October 17, 2012 at 7:55pm by Ryan*

**Pre-calculus**

For the ellipse with equation 5x^2+64y^2+30x+128y-211=0, find the cooridinates of the center, foci, and vertices. Then, graph the equation. my answer is: coordinates of center: (-3,1) foci:(-11,-1) and (4.7,-1) vertices: (-11,-1) (5,-1) (-3,-1+-square root of 5) not sure how ...
*Monday, January 19, 2009 at 7:22am by Mary*

**math**

Review examples 2, 3, and 4 in section 8.4 of the text. How does the author determine what the first equation should be? What about the second equation? How are these examples similar? How are they different? Find a problem in the text that is similar to examples 2, 3, and 4. ...
*Thursday, January 7, 2010 at 9:34pm by Anonymous*

**Algebra**

Review examples 2, 3, and 4 in section 8.4 of the text. How does the author determine what the first equation should be? What about the second equation? How are these examples similar? How are they different? Find a problem in the text that is similar to examples 2, 3, and 4. ...
*Thursday, February 4, 2010 at 6:18pm by Me*

**algebra**

Review examples 2, 3, and 4 in section 8.4 of the text. How does the author determine what the first equation should be? What about the second equation? How are these examples similar? How are they different? Find a problem in the text that is similar to examples 2, 3, and 4. ...
*Thursday, May 13, 2010 at 4:31pm by Susie*

**Algebra**

I am given a graph of a parabola and I have to write a function in at least two forms that will produce the graph. I think that I can write the factored form first since I have the two x-intercepts but I don't know what the "a" is in the equation y= a(x-r1)(x-r2). How do I ...
*Wednesday, January 5, 2011 at 9:39pm by Holly*

**math **

If the adjacent vertices of a square ABCD are A ( -2 , 0 ) , find - The equation of the two diagonals AC and BD - The point of intersection O of the two diagonals AC and BD - The equation of the altitude from O to the side CD - The centroid of the triangle OCD by finding any ...
*Tuesday, December 27, 2011 at 3:33am by Nora *

**calculus**

consider g(x)= {a sin x + b, if x ≤ 2pi} {x^2 - pi x + 2, if x > 2pi} A. Find the values of a a b such that g(x) is a differentiable function. B. Write the equation of the tangent line to g(x) at x = 2pi. C. Use the tangent line equation from part B to write an ...
*Friday, January 4, 2013 at 11:04am by Vanessa*

**GEOMETRY**

The diameter of a circle has endpoints P(10, 2) and Q(4, 6). a.Find the center of the circle. b.Find the radius. If your answer is not an integer, express it in radical form. c.Write an equation for the circle.
*Wednesday, May 30, 2012 at 1:15am by HELP PLEASE!*

**algebra1/McDougal Littell**

Is the given number a solution of the equation or the inequality? 4y-7=3y-4;3 equation I think it is the inequality. Try substituting 3 for y and see what you get. 4*3-7=3*3-4 or 12-7=9-4 Is this a valid equality? Alternative solution: solve for y 4y-7=3y-4 so y=3 thus 3 is a ...
*Thursday, September 14, 2006 at 8:49pm by tonya*

**calculus**

hi im back.. solve cosx= (squareroot3)/ 2 where 0 <(with a line underneath) x <(with a line underneath) 2 pie a) how many solutions are possible? b) in which quadrants would you find the solutions? c) determine the related angle for the equation. d) determine all the ...
*Wednesday, May 8, 2013 at 9:35pm by Maria*

**Grade 10-Math**

x+2y=3 5x+4y=8 I isolated x+2y=3 to make: x=3-2y then i began to sub in equation one with equation two: 5x+4y(3-2y)=8 5x+12-8y=8 after that i began to try to solve the equation but my answers were not correct. any help would be greatly appreciated!
*Saturday, September 24, 2011 at 5:19pm by peyton*

**advance functions gr12**

write an equation for a rational function whose graph has all of the indicated features: -vertical asymptote with equation x=3 -horizontal asymptote with equation y=2 -hole at x=1 no x intercept thank you
*Tuesday, April 2, 2013 at 1:17pm by sam*

**8th grade math HELP URGENT!!! **

Solve Each equation by first dividing each side of the equation by the number outside the parentheses. When would you recommend using this method to solve an equation? Explain. A. 9(x-4)=72. B. 8(x+5)=60
*Thursday, September 12, 2013 at 9:11pm by #HELP!!!*

**calculus**

Help! I have a test tommorow! I don't understand (b), (c), (e), and (g). The answers are listed following the each question. Here's a discription of the graph: There is a graph of a function f consists of a semi circle (-3 to 1 faced downward on the x-axis) and two line ...
*Friday, October 26, 2007 at 12:31am by Anonymous*

**Math**

Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=-16t^2+50t+6 b) How long is the ball in the air? ...
*Friday, April 16, 2010 at 3:07pm by Abbey*

**college algebra**

Using Systems of Equations. Please help!!! I'm not sure what steps to do, to work this problem. #7) Five hundred tickets were sold for a school play, which generated $3560 in revenue. The prices of the tickets were $5 for children, $7 for students, and $10 for adults. There ...
*Monday, November 22, 2010 at 5:00pm by Lee*

**Chemistry**

what is the balanced formula equation, complete ionic equation, and net ionic equation FeSO4(aq) + KCl(aq)
*Friday, October 26, 2007 at 8:25am by Anonymous*

**Algebra genius?**

Find the variation constant and an equation of variation where Y varies directly as X and Y=60 when X=10 k=variation constant y=equation of variation
*Saturday, May 5, 2012 at 8:23am by Maria1*

**calculus**

find the solution of the differential equation dy/dt = ky, k a constant, that satisfies the given conditions: y(0)=50, y(5)=100 please show steps. INtegrate dy/dt I think the answer will be in the form of y=e^kt + C check that and see if it works. You should be memorizing your...
*Tuesday, April 10, 2007 at 8:43pm by ae*

**math (urgent!)**

I was given a graph and told to find an equation for the temperature T in terms of the time t in the form T(t) = a sin(kt-c)+d where a, k, c and d are constants. The max was 32.9 and the min 21.1 I determined that amplitude = 5.9 vertical = 27 period = pi/12 The last thing I ...
*Sunday, January 13, 2013 at 9:53pm by Anonymous*

**Physics**

A man stands on the roof of a 15m tall building and throws a rock with a velocity of magnitude 30m/s at an angle of 33deg above the horizontal. Ignore air resistance. Calculate: a) the maximum heigh above the roof reached by the rock b) the magnitude of the velocity of the ...
*Monday, September 26, 2011 at 3:41am by Kyle*

**Math**

How do I Write the equation to find the slope of a line? Write the point-slope form of the equation of a line? Write the slope-intercept form of the equation of a line?
*Saturday, January 21, 2012 at 11:33pm by Steve T*

**antiderivatives**

find the equation of f(x) f''(x)= 2 + x^3 + x^6
*Sunday, November 8, 2009 at 5:24pm by Reen*

**algebra**

find the equation for x x-11 1/2 = 11 1/12
*Thursday, March 11, 2010 at 11:29pm by Anonymous*

**Calculus**

Find (dy/dx) for the equation (7x+8y/9x-4y)=4. a. (dy/dx)=(-29/24) b. (dy/dx)=(43/24) c. (dy/dx)=(29/24) d. (dy/dx)=(-43/24) e. (dy/dx)=4
*Thursday, September 22, 2011 at 10:11am by Angel*

**Math**

Find the dy/dx of the equation y=e^-x^2
*Sunday, November 4, 2012 at 11:08am by Anonymous*

**Algebra 2**

Can someone check my answers. Write the following equations in standard form. 1) x^2 - 2x + y^2 + 4y = 11 answer: (x-1)^2 + (y+2)^2 = 16 2) 4x^2 + 24x - y + 34 = 0 answer: y = 4(x-3)^2 + 2 3) The graph of which equation is a circle? A. 5x^2 + 10x = 9 + 5y^2 B. 5x^2 - 10x = 0...
*Monday, April 7, 2008 at 12:56pm by Troy*

**science**

if a egyptian mummy has 61% carbon-14 how long ago was it buried? Take a 100 g initial sample. Now there are 61 g C-14. Use ln(No/N) = kt where No = 100 N = 61 You will need k and you may obtain that from k = 0.693/t1/2. Look up t1/2 and substitute in that equation to find k, ...
*Monday, April 9, 2007 at 11:27pm by courtney*

**Algebra 1- Math**

At the ocean's surface the pressure is 1 atmosphere. At 66 feet below seal level, the pressure is 3 atmosphere. The Relationship between the pressure and the depth is linear. a. find the independent and dependent variable. b. create 2 ordered pairs. c. find the slope. d. ...
*Friday, December 14, 2012 at 4:09pm by Tony*

**math/ algebra**

how can i find the numbers Quadratic equation the sum of 2 whole numbers is 23. their product is 120. find the numbers
*Wednesday, December 7, 2011 at 6:06pm by Sara*

**Algebra**

'L' has y-intercept (0,-3) and is parallel to the line with equation y=2/3x+1. (Instructions - write the equation of the line 'L' satisfying the given geometric conditions) We know that two lines that are parallel must have the same slope. So this line must have the slope (2/3...
*Tuesday, August 7, 2007 at 3:33pm by Bee*

**Maths - Vectors**

The position vectors a,b,c of the points A,B,C relative to the origin O are ai, bj and ck respectively.Find: 1) a vector equation for the line l throught O which is normal to the plane ABC. 2) a vector equation of the plane ABC The answers should be: 1) r=t(bc i +ac j +ab k) ...
*Monday, February 2, 2009 at 10:32am by Claire*

**Algebra 2**

A company charges 16$ for a subscription. It has 30,000 subscribers. It looses 1,000 subscribers for every 1$ they raise the price. 1.Find the quadratic quation. (Can you tell me how to pull the numbers out of the question and put it into the equation?) Find the rate at 16$. (...
*Thursday, February 24, 2011 at 10:33pm by Anon*

**Math**

In 1990, the population of Cheyenne, Wyoming, was 73,142. By 2000, the population had increased to 81,607. Write and solve an equation to find, the increase in Cheyennes population from 1990 to 2000. Mercurys surface temperature has a range of 600 digress. This range is the ...
*Thursday, September 19, 2013 at 10:41pm by Crystal*

**Pre-Calculus**

Solve the equation 2x + 5y - 3z = -1. Write the general solution as a matrix equation. [x] [ ] [1] [y]= [ ] X [s] [z] [ ] [t] I'm supposed to fill in that blank in the middle, but I don't understand how to solve this if I'm only given one equation. please explain
*Friday, December 6, 2013 at 1:28am by Ann*

**HELP WITH ALGEBRA!!**

6. What happens to the graph of the line y = 3x -2 when the equation is changed to y = 3x +6? Look at the general equation for a straight line. It is y = mx + b where m is the slope and b is the y intercept. Therefore, the line crosses the y axis at -2 in the first equation ...
*Wednesday, November 1, 2006 at 3:22pm by Margie*

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