Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 214711: 2x-3y=-14
7x+68=y
Click here to see answer by drj(1380)

Question 214731: 6x+2y=8
-3x+y=20
8x+3y=34
-5x+y=27

Click here to see answer by drj(1380)

Question 214741: x+9y=48
-x+6y=27
Click here to see answer by jim_thompson5910(35256)

Question 214739: `6x+2y=8
-3x+y=20

Click here to see answer by drj(1380)

Question 214742: 5x+5y=-11
7x-2y=17
Click here to see answer by drj(1380)

Question 214740: 8x+3y=34
-5x+y=27
Click here to see answer by drj(1380)

Question 214749: given the function K(r)=10r+5 find each of the following
K(4)=
K(-9)=
K(6.7)=
Click here to see answer by drj(1380)

Question 214758: write the equation in slope-intercept form of the line satisfying:
m= 5/7, y-intercept (0,5)

Click here to see answer by drj(1380)

Question 214767: Find an equation of the line containing the given points
(1,3) and (3,4)
Click here to see answer by jim_thompson5910(35256)

Question 214764: Find slope-intercept form of the equation of the line with the following intercepts:
x-intercept: -7
y-intercept: 5
Click here to see answer by Earlsdon(6294)

Question 214764: Find slope-intercept form of the equation of the line with the following intercepts:
x-intercept: -7
y-intercept: 5
Click here to see answer by drj(1380)

Question 214776: Find the different quotient for the function f(x)=4x+4 Simplify
Click here to see answer by stanbon(75887)

Question 214798: Find the difference quotient for the function:
f(x)=-5x+3
Click here to see answer by Edwin McCravy(20056)

Question 214870: solve by elimination method
9x-9y=9
7y-3x=-5
Click here to see answer by drj(1380)

Question 214891: How to solve a+b+c=5 2a+3b-c=2 2a+3b-2c=4
Click here to see answer by RAY100(1637)

Question 214877: Solve by the elimination method
0.05x+0.25y=11
0.15x+0.05y=12
Click here to see answer by ankor@dixie-net.com(22740)

Question 214874: x/9 -y/7= -1
x-y=-3
solve the system with the addition method
Click here to see answer by checkley77(12844)

Question 214869: solve by elimination method
9x-9y=9
7y-3x=-5
Click here to see answer by checkley77(12844)

Question 214867: Solve by the elimination method
0.3x-0-2y=4
0.4x+0.5y=-29/19
Click here to see answer by drj(1380)

Question 214979: Help with this problem Please. Find the eqaution of each line. Write the eqaution in standard form unless otherwise.
Slope 2; through (-2,3)
Click here to see answer by Alan3354(69443)

Question 214978: Write an equation of each line. How do you do this? I got like 50 of these problems, if I can have help with one I should be able to do more.
Horizontal; through (-3,1)
Click here to see answer by Alan3354(69443)

Question 214977: Use the slope intercept form of the linear equation to write the equation of each line with the given slope and y-intercept.
Slope -1; y-intercept (0,1)
Please help!
Click here to see answer by Alan3354(69443)

Question 214976: Please help with this problem. State the slope and the y-intercept of each line given the equation.
Y=-4X+12
I know the slope is -4X buy how do I get the Y-intercept.
Thanks, Bill
Click here to see answer by Alan3354(69443)

Question 214980: Find the eqaution of each line. Write the eqaution in standard form unless indicated otherwise.
Through (1,6) and (5,2); use function notation. Thanks
Click here to see answer by Alan3354(69443)

Question 215006: A group of students are going on a field trip. The transportation will include vans, which can hold 7 students each, and buses which can hold 25 students each the school has five more vans than buses. If 127 students and 4 teachers are going on the trip, how many vans and buses will be used?
Click here to see answer by jim_thompson5910(35256)

Question 215070: y=8/3x+8
Click here to see answer by checkley77(12844)

Question 215093: solve by elimination method
7x+4y=15

4x-4y=-48
What is the solution of the system?
Click here to see answer by jim_thompson5910(35256)

Question 215116: Solve the system using any algebraic method.
x-y=17
1/2x-3y=1
Click here to see answer by jim_thompson5910(35256)

Question 215115: solve by substitution method what is the solution of the system? 4x+3y=-11 and -8x+y=43
Click here to see answer by jim_thompson5910(35256)

Question 215129: write an equation in slope-intercept form that satisfies each condition.
slope = 3/4 passes through (-6,9)
Click here to see answer by drj(1380)

Question 215235: by substituion.....
3x+5y=25
x-2y=10
Click here to see answer by drj(1380)

Question 215448: Ok wow I need some major help!! I need help on how to solve ordered pairs. I looked in my text book and that made me more confused!!
A) (-9,7), 7x+y<-9 What is the solution of the ordered pair?
B) 2x+9y=21, 5x-9y=-42
C) 2x+y=5, 3x+4y=-15
D) x=8, y=-7
E) Solve by te substitution method: 9m+n=8, m-9n=10

Click here to see answer by stanbon(75887)

Question 215572: Not sure how to solve this:
7,9;y=-7x+8 I need the equation of the line
Click here to see answer by Alan3354(69443)

Question 215578: if f(x)=3x+6 and g(x)=2x^2-x+3 what is g[f(2)]?
Click here to see answer by stanbon(75887)

Question 215574: Well, I didn't see linear programming anywhere, so I suppose this is the place to send in my question.
The available parking area of a parking lot is 600 square meters. A car requires 6 square meters of space, and a bus requires 30 square meters of space. The attendant can handle no more than 60 vehicles. If the parking fees are $2.50 for cars and $7.50 for buses, how many o feach type of vehicle should the attendant accept to maximize product? What would that profit be? Let X= the number of cars, let Y= The number of buses.
Note: My teacher used what he called "natural restrictions" when doing this on the board, and graphed the equations he got out of them. There was 4. (The >/= stnads for greater than or equal to, since I can't put in the actual symbol.)
1. x >/= 0
2. y >/= 0
3. x + y 4. 6x + 30y Then he shaded in the area inbetween all the lines, and found the points which made up the shaded area. If it wasn't an already given exact point, he had to find it throught the two line equations which made up that particular point.
He went incredibally fast, and thus I wasn't able to understand much of any of it...
Click here to see answer by stanbon(75887)

Question 215581: is the ordered pair (5,2) a solution to the given equations 2x-y=8 and 3x+2y=20?
Click here to see answer by stanbon(75887)

Question 215581: is the ordered pair (5,2) a solution to the given equations 2x-y=8 and 3x+2y=20?
Click here to see answer by drj(1380)

Question 215585: what is the y intercept of the points (1, 202) and (4, 382)?
Click here to see answer by drj(1380)

Question 215585: what is the y intercept of the points (1, 202) and (4, 382)?
Click here to see answer by solver91311(24713)

Question 215613: 3x+4y=-8 and -5x+y=-25
Click here to see answer by stanbon(75887)

Question 215613: 3x+4y=-8 and -5x+y=-25
Click here to see answer by RAY100(1637)

Question 215655: x+y=57
.25x+50y=925
Click here to see answer by drj(1380)

Question 215789:
Click here to see answer by Alan3354(69443)

Question 215984: derive the slope intercept form of a linear equation from the slope formula using (0,b) as the coordinates of the point where the line crosses the y axis and an arbitary point (x,y)
Click here to see answer by drj(1380)

Question 215985: Could you help me with the rest of this problem so far i have
2x > 8x - 24
-8x -8x
-24
Click here to see answer by rfer(16322)

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