@ math homework

Question

A $120 skateboard is on sale for 15% off and the sales tax is 7.5%. What is the final cost of the skateboard including tax?(Round to nearest cent)

Answer 1

.(1+0.075)(1-0.15)(120)= 1.075(.85)(120)= 1.075(102)

=exactly $109.65

after 15% discount of $18 and 7.5% tax or $7.65 tax on $102