Question

If x is a number that is 7 more than y, how do you express x as a function of y?
x = f(y) = 7 + x
x = f(y) = 7 + y
y = f(x) = 7x
y = f(x) = y – 7
y = f(x) = 7 + y

Answer 1

A and B are out since we are talking about x.

We are just adding 7 to y, which is y + 7.

Answer 2

Or 7 + y, doesn't matter.

Answer 3

so it would be which one?

Answer 4

Look at what I told you and then look at your options.

Answer 5

Which one do you believe it is?

Answer 6

the last one?

Answer 7

Yep.

Answer 8

thanks can you help with a few more please?

Answer 9

If f(x) = 3x + 2 and g(x) = 2x – 2, what is (f – g)(x)?
x + 4
x – 2
x
5x – 2

x – 4

Answer 10

and would you like a medal for the?

Answer 11

We can combine the functions based on the question.

(f-g)(x)

3x + 2 - 2x - 2

We can combine like terms. Do you know how to do that?

Answer 12

no