Question

Someone Helppp Meee!!! ***WILL GIVE MEDAL & FAN***




The tables below show solutions for the equations in a system of linear equations. Which ordered pair is a solution to the system?

(-17,23)

(-1,15)

(5,5)

(2,11)

Answer 1

cant help sorry

Answer 2

im not good at this stuff

Answer 3

It's fine!

Answer 4

I think it's either B or D. I do not know.

Answer 5

I think it's B.

Answer 6

I know the numbers that go into the questions marks....but I do not know the solution...
eq 1. eq 2
x y x y
-1 15 -7 23
2 10 -4 19
5 5 -1 15
8 0 2 11
11 -5 5 7

Answer 7

Ok thanks! I think the solution is what ever number is in both equations

Answer 8

Can you help me on my last question?

Answer 9

oh...then it would be (-1,15)

Answer 10

Match each system of linear equations with the quadrant in which the solution lies.


Match each term with it's Defintion!
3x + 2y = -15
x – 4y = -20

10x – y = -30
x – y = -2

2x – 5y = 10
x + 2y = 10

3x + y = 9
-7x –7y = -14


A.) IV

B. I

C. II

D.III

Answer 11

I'm really confused on this one!

Answer 12

3x + 2y = -15
x - 4y = -20 --->(-3)
----------------
3x + 2y = -15
-3x + 12y = 60 (result of multiplying by -3)
----------------add
14y = 45
y = 45/14 or 3 3/14
sub 45/14 in for y
x - 4y = -20
x - 4(45/14) = -20
x - 180/14 = -20
x = -20 + 180/14
x = - 280/14 + 180/14
x = - 100/14 = - 50/7 = - 7 1/7
solution is : (45/14, -50/7)......x is positive, y is negative
Quadrant 4......A

your just gonna have to solve the system of equations to determine what quadrant each one is in.

10x - y = -30
x - y = -2 --->(-1)
-----------------
10x - y = -30
-x + y = 2 (result of multiplying by -1)
----------------
9x = -28
x = -28/9

x - y = -2
-28/9 - y = -2
-y = 28/9 - 2
-y = 28/9 - 18/9
-y = 10/9
y = -10/9

here we have x being negative and y being negative
Quadrant 3 -- D

Answer 13

I would stay and finish but I have to go now......

Answer 14

Omggg Thnaks you !!! :) :)

Answer 15

these are the quadrants...
http://www.google.com/imgres?imgurl=http://www.mathsisfun.com/definitions/images/quadrants.gif&imgrefurl=http://www.mathsisfun.com/definitions/quadrant-graph-.html&h=204&w=205&sz=6&tbnid=4hEr468tQzEk7M:&tbnh=92&tbnw=92&zoom=1&usg=__viQ_E13ME9N9UxhEhZ4Cv8Wsq0Q=&docid=1GwJfvqA3eT7dM&sa=X&ei=57WoUoSqC4bvkQe8tIDgCw&ved=0CDUQ9QEwAg

Answer 16

What about the last 2? :)