He cost of a basic cheese pizza is $9.75. Each additional topping costs $1.75.
How many toppings are on a pizza that costs $20.25?

6 Toppings

Step-by-step explanation:

First you want to do $20.25-$9.75=x

Your x will equal $10.50!

Than you want to divide that by $1.75 and you get the answer of 6.

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13