Let f(x) = 4x and g(x) = x + 6. What's
the smallest number that is in the domain of
fºg?

For this case we have the following functions:

By definition of composition of functions we have to:

So:

By definition, the domain of a function is given by all the values for which the function is defined. The compound functionis defined for all real numbers.

The domain of is given by all real numbers.

Domain ∈ (-∞,∞)

dont understand

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10