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

Tutors Answer Your Questions about Linear Algebra (FREE)

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 145563:
Click here to see answer by rapaljer(4667)

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 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 147264: if f(3)=-6, write the corresponding ordered pair
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 147406:
Click here to see answer by Fombitz(13828)

Question 147403:
Click here to see answer by Fombitz(13828)

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 147723: please show your work on finding the inverse of the function problem

Click here to see answer by Edwin McCravy(8880)

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 148635: 2x(3x - 4y) – 3x(-3x + 4y)
Click here to see answer by mangopeeler07(462)

Question 148636: (3x -2y)²
Click here to see answer by mangopeeler07(462)

Question 148637: x² +14x +45
Click here to see answer by mangopeeler07(462)

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

Question 148646: 4x² +14x -30
Click here to see answer by checkley77(12569)

Question 148645: 6x³ +5x² +7x
Click here to see answer by checkley77(12569)

Question 148640: 6x³ +5x² +7x
Click here to see answer by checkley77(12569)

Question 148638: 4-³
Click here to see answer by checkley77(12569)

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 148669: x² +7x +10 = 0
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 148647: 4x -8/(6x² -12x)
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 148827:
Click here to see answer by Alan3354(30982)

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 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)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510