Question

Use the function to evaluate the indicated expressions and simplify.
f (x) = 7x - 1
f (2x) = _____
2f (x) = _____

Answer 1

If f(x) = 7x - 1
Then f(2x) would be 7(2x) - 1


If f(x) is 7x - 1
Then 2 times f(x) would be 2(7x -1)

Just simplify those two expressions and you have your answer.

Answer 2

so they are 14x-7 and 14x-7

Answer 3

?

Answer 4

14x-1 and 14x-7

Answer 5

i mean 14x-2

Answer 6

why would it be 14x-1

Answer 7

Sorry 14x-2

Answer 8

Yeap 14x-1 and 14x-2

Answer 9

that doesnt make sense if you distribute

Answer 10

7(2x) - 1
= 14x - 1



2(7x - 1)
= 2(7)x - 2(1)
= 14x - 2

Answer 11

actually you plug in the f(2x) into the x part of the equation so:
f(2x)=7x-1=7(2x)-1=14x-1

Answer 12

yup I see now some others already covered this