Question

Another graph question I'm iffy on.... (the answer either A or D?)
Which of the graphs below represent the graphical solution to the following system of equations?

3x - 4y = 32
5x + 2y = 10

Answer 1

Simply solve each equation for y, then equate the two equations to each other and solve for x, giving you the point of intersection.

Answer 2

I know, but solving for y is my problem

Answer 3

my not knowing of how to solve for y is my trouble

Answer 4

have you solved for x ?

Answer 5

yes @Coolsector

Answer 6

what did you get ?

Answer 7

2, 0 and 0, 5 for inserting the numbers

Answer 8

5x-2y=10

if x=6,y=10 then 5x = 30

2y=20

then 30-20=10

Answer 9

wait .. you should find only one value of x ..

solving for x :

3x - 4y = 32
5x + 2y = 10

multiply the second equation by 2 :

3x-4y=32
10x + 4y = 20

add both equations :

13x = 52
x = 4

Answer 10

I'm writing this down if that's ok

Answer 11

my error, I suck at math

Answer 12

Ok, it's written

Answer 13

so after you find x .. you can find y by plugging x in one of the original equations

Answer 14

a good way to check yourself is to plug it into both of the equations and see if the same value of y pops out

Answer 15

I will try that next time :)

Answer 16

do it now .. try and get the y value

Answer 17

you dont know it yet .. you just know x=4.

Answer 18

What about the y value?

Answer 19

3(4) - 4 y = 32

Answer 20

3(4) = 12
12- 4 y = 8

Answer 21

i dont understand anything ..
what is y if x = 4 ?

Answer 22

1?

Answer 23

I'm sorry i don't know.... :(

Answer 24

please help me find y....

Answer 25

if we plug x =4 into the first equation :
3x - 4y = 32
we get
3 * 4 - 4y = 32
-4y = 20
y=-5

Answer 26

same goes for the second equation :
5x + 2y = 10

5*4 +2y = 10
2y = -10
y= -5

Answer 27

so the intersection is (4,-5)
you have a graph like this.

Answer 28

B

Answer 29

oh my god thank you!!!1 i'm going to write all of this down!!!1

Answer 30

yw