Question

Variable c is 9 more than variable w. Variable c is also 3 less than variable w. Which pair of equations best models the relationship between c and w?

c = w − 9
c = 4w + 3
c = w + 9
c = w − 3
w = c + 9
w = c − 3
w = c − 9
w = 4c + 3

Answer 1

@mathstudent55

Answer 2

@fallenangelorchid

Answer 3

Let's start with this.
"Variable c is 9 more than variable w."

Answer 4

That means c = w + 9
If we subtract 9 from both sides, we get c - 9 = w

That means the first statement can be either
c = w + 9, or
c - 9 = w

From here, we see that choices 2 and 4 have the correct first equation.
We can eliminate choices 1 and 3.

Answer 5

Now we need to pick from choices 2 and 4, which one also has the correct second equation.

Answer 6

The second equation comes from this statement:
"Variable c is also 3 less than variable w. "
The equation for this statement is:
c = w - 3
Can you pick the correct choice from choices 2 and 4?

Answer 7

2

Answer 8

Correct.

Answer 9

thank you so much :)