Does anyone know how to do these?

D.

Step-by-step explanation:

f(x) =

g(x) = 2x + 3

(x)  = 'f' divided by 'g'

   Substitute.

x cannot be - because that would create a zero in the denominator.

That's a no-no.

It makes it 'undefined'

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80