Question

How do I find how many solutions are there to the following system of equations?

2x – y = 2
–x + 5y = 3

Answer 1

What I've done so far:

5(2x – y = 2) ----> 10x - 5y = 10
(–x + 5y = 3) ---> -x + 5y = 3
Cross out the 5y's....
10x = 10
-x = 3
then I add
so
9x/9 = 13/9

Answer 2

so x=13/9
apply this value in ur first eqn and find the value of y.

Answer 3

ohhh
let me do it out one second please :P

Answer 4

oh k. I will wait.

Answer 5

Ah. idk how to do it :/

Answer 6

2x-y=2
2*13/9-y=2
nw can u do?

Answer 7

OH that's what I did wrong! I made it "y" and not x!

Answer 8

sorry. i didn't get u

Answer 9

No you're good :P I got y = 8.9 is that correct

Answer 10

it has to b 0.89

Answer 11

sorry, moved the decimal :P

Answer 12

So

A.
0

B.
1

C.
2

D.
infinitely many

Answer 13

Those are teh answers I can choose....how can I find which one it is?

Answer 14

only 1 solution

Answer 15

Could you explain to me why?

Answer 16

R u familiar with graphs?

Answer 17

Yes, and I thnik I found it in my book :P Thanks though

Answer 18

I hate graphs :P

Answer 19

Ooh I get it! Thanks so much :D

Answer 20

sure u got it. if nt I will explain. no problem

Answer 21

Nope, I think I'm good :) Would you mind helping me with the rest?

Answer 22

ha k. sure post them.

Answer 23

Thanks!

Answer 24

Write a system of equations to solve the following problem. Let c be the number of child tickets and a be the number of adult tickets.

Each child ticket for a ride costs $3, while each adult ticket costs $5. If the ride collected a total of $115, and 33 tickets were sold, how many of each type of ticket were sold?

My answer:
3c + 5a = 115
a + c = 33

Answer 25

u r right.

Answer 26

Thanks! I appreciate you helping me :)

Answer 27

u r welcome. :)