# Questions on Algebra: Linear Algebra (NOT Linear Equations) answered by real tutors!

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 Algebra: Linear Algebra (NOT Linear Equations) Solvers Lessons Answers archive Quiz In Depth

 Question 643881: I have done 7/10 of my homework. I will submit each one separately. The answers are randomized on the back, but it seems as if they aren't correct. #6. The total surface area of a can is 188.4 in squared. If the radius of the can is 3 inches. what is the height of the can? I tried, s=2 times pi times 3 times height plus 2 times pi times 3 ^2 Click here to see answer by MathTherapy(1424)

 Question 644646: The question states: Find an equation for the line. 4. through (-8,8) and parallel to y = 3/2x -3. I have a test on tuesday and cant figure out the steps to work this problem out. Can you please help me. 5. through (-3,8) and vertical 6. through (-7,5) and perpendicular to y=2/3x -2 Can someone walk me through the steps in solving these questions. Thanks Click here to see answer by nerdybill(6959)
 Question 644646: The question states: Find an equation for the line. 4. through (-8,8) and parallel to y = 3/2x -3. I have a test on tuesday and cant figure out the steps to work this problem out. Can you please help me. 5. through (-3,8) and vertical 6. through (-7,5) and perpendicular to y=2/3x -2 Can someone walk me through the steps in solving these questions. Thanks Click here to see answer by MathLover1(6634)

 Question 644709: I cannot figure out how to set this question up, so please help! A machine that originally cost \$15,600 has a value of \$7,500 at the end of 3 years. The same machine has a value of \$2,800 at the end of 8 years. a. Find the average rate of change in value (depreciation) of the machine between its purchase and the end of 3 years. Please help if you can! Thank you. Click here to see answer by stanbon(57352)

 Question 645565: Hi, I wanted to check my answer to this problem. Use the limit definition to find the following derivatives. 1) f(x) = 3x^2 For this problem I got f'(x)=6x. Is this correct? 2) h(x) = x^3 This problem, I couldn't get. I think you have to multiply x^2+2xh+h^2(x+h). Is this right. Your help is appreciated. Thanks! Click here to see answer by ewatrrr(10682)

 Question 646235: What is the slope of a binomal 3x+5 Click here to see answer by stanbon(57352)

 Question 646308: is this linear or not linear? y=-2x -- 3 Click here to see answer by solver91311(16885)

 Question 646934: My directions are: Solve the linear system. And i am given the two equations: 2c - d = -2 and 4c + d = 20. I dont know what to do! can you please explain it and help? thank youuuu! Click here to see answer by stanbon(57352)

 Question 647946: Find the value of x and YZ if Y is between X and Z. XY=12, YZ=2x, And XZ=28 Click here to see answer by fcabanski(874)

 Question 648780: Find the equation of a line in slope-intercept from that passes through the points (6,5) and (4,1). I don't want just the answer, I would like to actually learn how to work this out myself. Just need help and steps to do so. Click here to see answer by rfer(12660)

 Question 650162: find each value if f(x)=3x+2 and the promblem is f(-5) Click here to see answer by ewatrrr(10682)

 Question 651090: Find the distance from the point (3,5,-4) to the line that passes through the points (5,2,7) and (-3,6,4). Also what point on that line is closest to the point (3,5,-4) Click here to see answer by Edwin McCravy(8909)

 Question 651732:    For the function f(t)=(2t+3)/(5)  Solve f(t) = 2. Click here to see answer by stanbon(57352)

 Question 651771: Select ALL calculations that are measured in square units. Answer The amount of fencing needed to surround a garden The amount of carpet needed to cover a floor The amount of sod needed to cover a dirt yard The amount of base boards (molding) needed for a room The amount of water needed to fill a bucket The amount of paint needed to cover a wall Click here to see answer by MathLover1(6634)

 Question 651770: Select ALL calculations that are measured in linear units. Answer The amount of fencing needed to surround a garden The amount of carpet needed to cover a floor The amount of sod needed to cover a dirt yard The amount of base boards (molding) needed for a room The amount of water needed to fill a bucket The amount of paint needed to cover a wall Click here to see answer by jim_thompson5910(28595)

 Question 652969: I need to graph and solve each system 8x-3y=-3 4x-2y=-4 Click here to see answer by MathLover1(6634)

 Question 653117: S = n(a + l)/2 solve for l The first thing I did was use distributive property for n(a + l). So then: S = (na + nl)/2 Then, I thought about trying to cancel out the 2, leaving it as: 2S = 2na + 2nl Am I on the right track? Click here to see answer by Edwin McCravy(8909)

 Question 653538: In slope-intercept form. Write an equation. Passes through (2,5) parrallel to the graph 2x+3y=6 Click here to see answer by schmidtmomto6(24)

 Question 653239: determine whether the following functions are linear transformations. justify your answer. a)T:M22 -> M23 where B is a fixed 2*3 matrix and T(A)= AB Note: M22 is a matrix of 2 by 2 and M23 is a matrix of 2 by 3 b)F:Mmn->Mmn where F(A)=AT NOTE: Mmn denotes matrix of m by n Click here to see answer by 9003105888080(1)

 Question 655272: Find the difference quotient F(x)= 5x - x^2 F(5 +h) - f(5) Click here to see answer by nerdybill(6959)

 Question 656775: Calculate the distance between the pointsD=(-4,5) and K=(5,9) in the Cartesian plane. Write the exact answer in radical form. Click here to see answer by solver91311(16885)

 Question 656962: graph each inequality: x + y > -5 Click here to see answer by MathLover1(6634)

 Question 656996: how can you tell if this equation is linear? 2y=2x-1 over 4 Click here to see answer by solver91311(16885)
 Question 656996: how can you tell if this equation is linear? 2y=2x-1 over 4 Click here to see answer by stanbon(57352)
 Question 656996: how can you tell if this equation is linear? 2y=2x-1 over 4 Click here to see answer by Amar Price(1)

 Question 657284: Slope= -1; through (3,5) (-4,10) and (-6,15) Y= -3/5x + 3 X- 4y = -4 I need help with trying to solve these four problems Click here to see answer by stanbon(57352)

 Question 657512: How do you find a slope of a line through (-1, 3) and (-3, 7) Click here to see answer by colliefan(239)

 Question 657567: Determine whether y varies directly with x in the equation . If so, what is the constant of variation? A. yes; k = 3 B. yes; k = 6 C. yes; k = 3(x 1) D. no Click here to see answer by rfer(12660)

 Question 657944: how can i find the value of y? 4^2y + 4^(2y-1) = 4 Click here to see answer by Alan3354(30993)
 Question 657944: how can i find the value of y? 4^2y + 4^(2y-1) = 4 Click here to see answer by Edwin McCravy(8909)
 Question 657944: how can i find the value of y? 4^2y + 4^(2y-1) = 4 Click here to see answer by MathLover1(6634)