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

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 617535: fourteen cans of pet food cost 9.60 the cat cost .60 the dog cost 0.75 how many cans of each were purchased

Click here to see answer by Greenfinch(383)

Question 619156: find the slope-intercepts equation of the line with the following properties: parallel to the line x=4 ; containing the point (-7,7)
Click here to see answer by nerdybill(6959)

Question 619373: let a = -5a1 + 4a2
-8a1 + 7a2
find :
13
A .
Click here to see answer by Alan3354(30993)

Question 619657: What is the slope of this line 3x+y=4?
Click here to see answer by varun(12)

Question 619809: Two baseball players hit 79 home runs combined last season. The first player hit 7 more home runs than twice the number of home runs the second player hit. How many home runs did each player hit?
Click here to see answer by ewatrrr(10682)

Question 619971: fix it fast plumbing charges $25 for a house call and $50 for each hour spent on the job. do it right plumbing charges $35 for a house call and $45 for each hour spent on the job. how many hours must be spent on the job in order for the charges of the two plumbingcompanies to be equal?

Click here to see answer by dragonwalker(72)

Question 620121: Consider the system of equations: x + y + z = 210; x + z = 230; x + y = 120 What is the value of x?
Click here to see answer by ewatrrr(10682)

Question 620746: x+2y=4
2x-3y=1
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Question 620787: 0=7x
Click here to see answer by Alan3354(30993)

Question 620867: when combining like terms and simplifying expression what is the answe to this problem or how do I work it out? -9(6m-3)+6(1+4m)

Click here to see answer by ewatrrr(10682)

Question 620956: I need to slove for x, but I dont know how, can you help me please?
3x+9<4(-5)-x+3+2x
3(2x-4)-4x+7<9
5|2x-5|-3=12
3}2x-5|>21
and also
5*2-9+2*4(2-(-3))
Click here to see answer by solver91311(16885)

Question 621521: Find the slope of the line.
2x - 5y = -24

Click here to see answer by Alan3354(30993)

Question 621523: Write the equation of the line with the given slope and y-intercept.
slope 2/3 ;

Click here to see answer by Alan3354(30993)

Question 621520: What is true about the line that passes through the points (3, -7) and (3,2)? please help me
Click here to see answer by Alan3354(30993)

Question 621524: Graph the equation by finding the slope and y-intercept.
x + 7y = -7

Click here to see answer by math-vortex(472)

Question 621818: solve the system of equations by the addition method
-3y-y=3
9x+y=3
Click here to see answer by Alan3354(30993)

Question 622252: what are the answers to:
1.n/3+5=7
2. 3n+5=23
Click here to see answer by lynnlo(4164)

Question 623243: If
f(x) = {-2x - 6, if x > 2 and x - 4, if x < 2}
what is f (3)?

Click here to see answer by ewatrrr(10682)

Question 623380: (x-9) (x-9)= x2-81
-how did you find the factors of x2-81?
Click here to see answer by Alan3354(30993)

Question 623912: What can be said of points lying on the line bisecting the 2nd and 4th quadrant?
Click here to see answer by ewatrrr(10682)

Question 624233: A line that passes midway between and is parallel to both x - y = 6 and x - y = -6.

Click here to see answer by Alan3354(30993)

Question 271464: what is the product of 7 and -3?
Click here to see answer by lenny460(770)

Question 624750: Assume that all matrices are invertible and solve for the matrix X in:
(A^-1 X)^-1 =A (B^-1 A)^-1
Click here to see answer by jim_thompson5910(28595)

Question 625365: How do I solve:
3X/1/X-Y
Click here to see answer by Alan3354(30993)

Question 625338: what are the characteristics of linear funtion

Click here to see answer by rfer(12660)

Question 625859: Could you please help solve this For the given equation, list the intercepts and test for symmetry.
y = -8x^3/x^4 -6
Thanks so much.
Click here to see answer by lwsshak3(6505)

Question 626003: How can I solve 3x+2y=5 & x-2y=4 by using elimination method?
Click here to see answer by Edwin McCravy(8909)

Question 626134: Find the value of k so that the line kx-5y=21 will contain the point (-2,-1).
Click here to see answer by Edwin McCravy(8909)

Question 626137: Find the value of k so that the point (k,k) lies on the line 2x-4y=8
Click here to see answer by jim_thompson5910(28595)

Question 626224: if the hand of the clock is 10 cm long how far will it move within 1 hour

Click here to see answer by Alan3354(30993)

Question 626224: if the hand of the clock is 10 cm long how far will it move within 1 hour

Click here to see answer by Edwin McCravy(8909)

Question 626254: if (a,10) is a point of the graph of y=x^2-3^x, what is a
Click here to see answer by Alan3354(30993)

Question 626564: 1. Find the value of b so that 3x-2y=4 is parallel to 6x+by=12
2. Find the value of c so that x-3y=c will pass through (2,-1)
Click here to see answer by stanbon(57354)

Question 626708: Find an equation for the line with the given properties,express the equation in slope-intercept form.
P=(-3,-5) and Q=(-2,-3)
What is equation line?
Click here to see answer by jim_thompson5910(28595)

Question 626781: Find c so that x-3y=c is not parallel to 2x-6y=10.
Click here to see answer by richwmiller(9143)

Question 626912: y=(x-3)(x-1)
Click here to see answer by ewatrrr(10682)

Question 626970: what is the equation of a line given the two points (2,1) (-2,-1)
Click here to see answer by jim_thompson5910(28595)

Question 627050: What is the Least Common Denominator of 2(3+2x)= 3(x-4)?
Click here to see answer by Edwin McCravy(8909)

Question 627262: what is irrational numbers?

Click here to see answer by Earlsdon(6287)

Question 627331: if bx=c-x,x=?
Click here to see answer by jim_thompson5910(28595)

Question 628239: solve 3-2x>15
Click here to see answer by jim_thompson5910(28595)

Question 628450: Find the coordinates of B given A(4,-2) and M(4,7). M is the midpoint
Click here to see answer by John10(245)

Question 628808: what is 4X^2=25

Click here to see answer by vleith(2825)

Question 628808: what is 4X^2=25

Click here to see answer by Alan3354(30993)

Question 628963: i need help solving nonlinear equations i don't understand
Click here to see answer by solver91311(16885)

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