# 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 144840: Hello name is susan, will you help me understand this problem solve for k, t=3k +3u Click here to see answer by checkley77(12569)
 Question 144840: Hello name is susan, will you help me understand this problem solve for k, t=3k +3u Click here to see answer by vleith(2825)
 Question 144840: Hello name is susan, will you help me understand this problem solve for k, t=3k +3u Click here to see answer by jim_thompson5910(28503)
 Question 144840: Hello name is susan, will you help me understand this problem solve for k, t=3k +3u Click here to see answer by josmiceli(9654)

 Question 145524: I am working with Inverse functions and need help find (f(g))(x) and (g(f))(x) given f(x)=log(2)x g(x)=2 to x power sorry if that is written confusing.. on paper the 2 after log is lowered Click here to see answer by jim_thompson5910(28503)

 Question 145904: z=2x+4y x>=0, y>=0 Linear programming problem, graphing a solution, and maximum. x+3y>=6 x+y>=3 x+y<=9 I come up with serveral vertices. Even when using the example. I know how to put the vertices back into the equations, but I need to figure out how to limit or pick the correct vertices; (0,0), (0,2), (6,0), (0,3), (3,0), (5,4), (6,3), (0,9) My graphe looks like a octagon kind of including 0. I am missing something and trying desperately to understand this. Can someone show me how I conclude which vertices are correct? Heidi Click here to see answer by scott8148(6628)
 Question 145904: z=2x+4y x>=0, y>=0 Linear programming problem, graphing a solution, and maximum. x+3y>=6 x+y>=3 x+y<=9 I come up with serveral vertices. Even when using the example. I know how to put the vertices back into the equations, but I need to figure out how to limit or pick the correct vertices; (0,0), (0,2), (6,0), (0,3), (3,0), (5,4), (6,3), (0,9) My graphe looks like a octagon kind of including 0. I am missing something and trying desperately to understand this. Can someone show me how I conclude which vertices are correct? Heidi Click here to see answer by stanbon(57231)

 Question 146142: F(x)= x(squared)- 3x The difference quotient of a function f at x=a is defined to be the ratio [f(a + h) - f(a)]/h. find the difference quotient of each function at a=2. Click here to see answer by solver91311(16868)

 Question 146169: I need help. Suppose that A^-1=Matrix[2 -1] find A 3 5 Click here to see answer by stanbon(57231)

 Question 146198: hello please help me on this question i dont understand how to figure it out. the total area of a rectangle is 4x-9y ( please note there is a little four ontop of the x but sence i do not know how to type that on the computer im sorry)which factors could represent the length times width? THANK YOU Click here to see answer by jim_thompson5910(28503)

 Question 146207: ok here i have some pre-cal ...extremely confusing! please lend help! If the average of three numbers is V.If one of the numbers is Z and another is Y, What is the remaining number? i think its ZY-V but im not sure.. thank youu!!! Click here to see answer by ptaylor(2048)

 Question 146876: Here is the question Write an equatio in standard form for a line that passes through each pair of points. 1.(3,1),(-1,-3) 2.(3,4),(-1,-4) thank you for your help! Click here to see answer by jim_thompson5910(28503)

 Question 147357: V=s^3 500=s^3 Need to know how to solve for volume when only volume is given. Need step by step instructions. Thanks. Click here to see answer by vleith(2825)

 Question 147497: how much water must be evaporated from 240 gallons of a 3% salt solution to produce a5% salt solution? Click here to see answer by nerdybill(6948)

 Question 147864: Given f(x) = –5x – 3, find f(a – 2). Can someone help me out with this? thanks Click here to see answer by josmiceli(9654)

 Question 147863: Given f(x) = 5x^2 – 3x + 1, find f(–2). Can someone help me out with solving this? v/r Jessica Click here to see answer by josmiceli(9654)

 Question 147892: Rewrite the equation 2x-3y=-6 as a fuction of x Well someone please help me with this? I am not sure what needs to be done. thanks Click here to see answer by Fombitz(13828)

 Question 148555: Can anyone help me solve this problem? 5/2x+1/4x=3/4+x Click here to see answer by mangopeeler07(462)
 Question 148555: Can anyone help me solve this problem? 5/2x+1/4x=3/4+x Click here to see answer by Alan3354(30982)
 Question 148555: Can anyone help me solve this problem? 5/2x+1/4x=3/4+x Click here to see answer by ankor@dixie-net.com(15632)

 Question 148541: I need help. #1 find the parametric equations for line passing through the points P(5,-2,4) Q(7,2,-4). #2 show that if v is a nonzero vector, then v/ llvll is a unit vector Click here to see answer by Alan3354(30982)

 Question 148650: Find the slope of a line passing through (-4, 6) and (-2, 5) Click here to see answer by Alan3354(30982)

 Question 148671: The hypotenuse of a right triangle is 10. One side is 2 less than the other. Find the length of each leg. Click here to see answer by ankor@dixie-net.com(15632)

 Question 148674: Find the equation of the line passing through (2, 4) and (-3, 8) Click here to see answer by stanbon(57231)

 Question 148673: 2x –y = 8 x + 2y = 14 Click here to see answer by stanbon(57231)

 Question 148649: (x² -4x -5)/(x² +2x +1) ÷ (x -5)/(x +4) Click here to see answer by nerdybill(6948)

 Question 148726: Find the LCM. 4m^2-64 and 6m^2-18m-24 A. 24(m – 4)(m + 4)(m + 1) B. 12m(m – 4)(m + 4)(m + 1) C. 12(m – 4)(m + 4)(m + 1) D. 24(m – 4)(m + 4)2(m + 2) Click here to see answer by oscargut(891)

 Question 148913: With these two problems, I am very confused, because math is not my thing, and I do not understand it. 1. -3[5+2(-7+x)+x]= -3x- (x+3) I do not even know where to begin with this one. 2. 4x+4/5= 5x-1/2-x/3 (the / are over signs) Click here to see answer by ankor@dixie-net.com(15632)
 Question 148913: With these two problems, I am very confused, because math is not my thing, and I do not understand it. 1. -3[5+2(-7+x)+x]= -3x- (x+3) I do not even know where to begin with this one. 2. 4x+4/5= 5x-1/2-x/3 (the / are over signs) Click here to see answer by mangopeeler07(462)

 Question 149845: Solve 3x + 4y = 8 for y Then, when graphed this would would be a line. By examining your answer to this problem what is the slope and y-intercept of this line? Click here to see answer by nerdybill(6948)

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