Question

Select the system of equations that corresponds to the given graph.

http://puu.sh/10MXT

4x + 2y = 12
4x + 2y = 4

2x + 3y = 4
6x + 9y = 12

2x + 4y = 12
2x + y = 3

2x + 3y = 8
−x + y = −4

Answer 1

It looks like both lines go through the point (4,0). One way to do this problem is to plug in the numbers, 4 for x and 0 for y, into each answer choice to see which one works.

Answer 2

It doesn't work for any of the first ones.

Answer 3

Wait, Nevermind.

Answer 4

The last choice looks ok:
2x + 3y = 8 ----> 2(4) + 3(0) = 8 true
−x + y = −4 -----> -4+0 = -4 true

Answer 5

Is it d?

Answer 6

Could you help me on this aswell?

Your piggy bank has a total of 41 coins in it; some are dimes and some are nickels. If you have a total of $3.45, how many nickels do you have?

Answer 7

let x = number of nickels
let y = number of dimes

(First sentence) x + y = 41
(second sentence) 0.05x + 0.1y = 3.45

Answer 8

Alright, let me try that really quick.

Answer 9

There is alot of possible X & Y 's , Could you narrow it down some?

Answer 10

You'll need to actually solve that one!!! use substitution or elimination.