The pie store is having a 20\%20%20, percent off sale on all of its pies.

If the pie you want regularly costs \$18$18dollar sign, 18, how much would you save with the discount?

\$\$ dollar sign, space

29.5977692753

step-by-step explanation:

answer: -10

step-by-step explanation:

s(t) = 1 - 10t

s(x) = 1 - 10x

s(x + h) = 1 - 10(x + h)

            = 1 - 10x - 10h

s(x + h) - s(x) = 1 - 10x - 10h - (1 - 10x)

                      = 1 - 10x - 10h - 1 + 10x

                      = -10h

= -10

#12 the answer is the third option