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

Tutors Answer Your Questions about Linear Algebra (FREE)

Question 593417: help me solve, and show the steps.75+ 2d>125
Click here to see answer by saifoo.khan(162)

Question 593991: Use the elimination method to solve the following system of equations
4x – 2y – z = –5
x – 3y + 2z = 3
3x + y – 2z = –5
Click here to see answer by Alan3354(30993)

Question 595836: please help me simplify
Click here to see answer by richwmiller(9143)

Question 596273: 6 = x^2 - x
solution set for the following equation
Click here to see answer by jim_thompson5910(28598)

Question 597662: name the set(s) of numbers to which 1.18 belongs.

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Question 597662: name the set(s) of numbers to which 1.18 belongs.

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

Question 597705: 32x+32
Click here to see answer by jim_thompson5910(28598)

Question 597802: What is the value of the expression 4x-2xy, when x=-1 and y=5?

Click here to see answer by Alan3354(30993)

Question 597990: A stationery company sells two types of notepads to college bookstores, the first wholesaling for 50¢ and the second for 70¢. The company receives an order for 550 notepads, together with a check for $311. If the order fails to specify the number of each type, how should the company fill the order?
Click here to see answer by josmiceli(9697)

Question 598515: -2x + 3y - 4z - w = 1
x + 2y + 2z - w = -2
x - 5y + 2z = 1

how do I solve this equation?
Click here to see answer by Alan3354(30993)

Question 600876: x+y+6z=-31
x+y+9z=-43
x-2y-6z=-26
i have to find out the xyz by eliminating variables
Click here to see answer by lynnlo(4164)

Question 600875: x+y+6z=-31
x+y+9z=-43
x-2y-6z=-26
i have to find out the xyz by eliminating variables
Click here to see answer by lynnlo(4164)

Question 600960: what is the equation of the line plots (-2,1) (0,1)
Click here to see answer by mananth(12270)

Question 601081: simplify 4*(-5)

Click here to see answer by richard1234(5390)

Question 601082: simplify completely 3(2x+1)-4x
Click here to see answer by rfer(12678)

Question 602871: 7^3/5
------
7^1/5
Click here to see answer by flame8855(424)

Question 603096: Determine what m and b represent: The cost, in dollars, of retaining the services of a computer repairman in Anchorville is given by C(x)=49x+21, where x is the number of hours worked.
Click here to see answer by KMST(1874)

Question 603729: Please help me solve the equation for w 2w^2 + 7w = -6
is the answer -3?
Click here to see answer by alicealc(281)

Question 604212: What is
27-3x=15
8-x/3=6
and could you explain it step by step
thanks

Click here to see answer by flame8855(424)

Question 604295: whats the vertex form of the graph y=x^2+4x-1
Click here to see answer by lawdej(58)

Question 605091: state the slope of the line y=6
Click here to see answer by asuar010(324)

Question 605423: b = =-4/3.
1. Subtract 1 from the left side, you then have b/2 = -2/3.
2. Multiply by 2 to get the by alone...2(b)=(-2/3)2.
3. b is equal to -4/3.
Click here to see answer by Andr3w128(2)

Question 606779: Ln(x+7)=ln(3x-5)
Click here to see answer by nerdybill(6963)

Question 607237: Find the Wronskian of 1, cos2x, sin²x at x=PI/2. Are these functions dependent?
Click here to see answer by solver91311(16897)

Question 606873: < does this mean you shade above or under the line ?
And what does this one mean too ? >
Click here to see answer by richard1234(5390)

Question 608299: how do i solve y is greater than or equal to negative 4?

Click here to see answer by Alan3354(30993)

Question 608520: What is the equation of the line that has an x-intercept of −5?

Click here to see answer by flame8855(424)

Question 608556: show that e^x and e^2x are independent.
Click here to see answer by ewatrrr(10682)

Question 608556: show that e^x and e^2x are independent.
Click here to see answer by solver91311(16897)

Question 609099: -3(4-x)=5-(x+1)
Click here to see answer by ewatrrr(10682)

Question 609360: solution for
y=x
y=-x+2
using the substitution method
Click here to see answer by flame8855(424)

Question 609592: i need help on equation and inequality
Click here to see answer by solver91311(16897)

Question 610134: determine whether the equation 3x - 4y = 0 is linear in the variables x and y.
Click here to see answer by Alan3354(30993)

Question 610150: square root of x+10 -7= negative 5

Click here to see answer by flame8855(424)

Question 611367: how do I rewrite the quadratic equation y=x^2+6x-8 in vertex form
Click here to see answer by solver91311(16897)

Question 611592: 7y-6(y-1)+3=9
Click here to see answer by lynnlo(4164)

Question 612677: what is the end behavior of y=x
Click here to see answer by stanbon(57415)

Question 613046: 14x^3 + 21x^2 + 16x + 24
please help me
Click here to see answer by jim_thompson5910(28598)

Question 613837: An airplane flying against the wind travels 242 miles in the same time that it can travel 253 miles with the wind. If the wind sped is 15 miles per hour, what is the speed of the airplane in still air ?
Click here to see answer by mananth(12270)

Question 614000: A boat travels 120 km downstream in 4 hours and takes 6 hours to return. How long will it take in still water?
Click here to see answer by ankor@dixie-net.com(15664)

Question 614444: Consider the linear function f(x)=A(x-B)+C. Discuss all the changes in the graph as A,B,and C change from positive,negative,zero, as well as, grow smaller or larger. Discuss the domain and range of linear functions.
Click here to see answer by josmiceli(9697)

Question 614521: the line passing through points (x,4)and(4,-5) is perpendicular to a line with a slope of -7/3.Which is the value of x?
Click here to see answer by ewatrrr(10682)

Question 615518: Solve:
3x-2(x-1)=x-6
I came up with x+2=x-6 which means no solution and got it wrong. Please help with the steps.
Click here to see answer by jim_thompson5910(28598)

Question 617525: 180 students are graduating from Johnson HS. If the ratio of the grils to boys is 5:4, how many boys are in the class
Click here to see answer by Maths68(1474)

Question 617524: 80 students are graduating from Johnson HS. If the ratio of the grils to boys is 5:4, how many boys are in the class
Click here to see answer by Maths68(1474)

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