Question

Use elimination to solve the following system.

x+y= 10
3x + 3y = 30
A. (0, 10)
B. (10,0)
C. no solution
D. infinitely many solutions
Hurry !

Answer 1

A (0, 10)

Explanation:

Answer 2

D its

Explanation:

Since x+y = 10-----(1)

And 3x+3y = 30----(2)

We can see from (2) that 3(x+y) =30;

Also same as saying x+y = 30/3 which is equivalent to x+y = 10.

So in this case we have many possible values

x = 0, y = 10 and vice versa

x = 1, y = 9 and vice versa

x = 2, y = 8 and so on

So the question has a lot of solutions