Question

Which value, when placed in the box, would result in a system of equations with infinitely many solutions?

y = 2x – 5

2y – 4x =

a. –10
b. –5
c. 5
d. 10

Answer 1

@sleepyjess do you know what i have to do?

Answer 2

First, let's get these into the same format. I would probably subtract 2x from both sides of the first equation.

Answer 3

so 2x-2y?

Answer 4

Close, y - 2x = -5

So,
y - 2x = -5
2y - 4x = ?

What do you notice between the x's and y's in each equation?

Answer 5

their all lined up in the same place

Answer 6

i got -10 and that was the anwser (: thank you!

Answer 7

Yes, we did that to see the correlation between them :)

Answer 8

Good! The second equation was double the first equation :3