At a skateboard shop: a) The price tag on a shirt says $12.58. Sales tax is 7.5% of the price. How much will you pay for the shirt? Show your work

b) The store buys a helmet for $19.00 and sells it for $31.50. What percentage was the markup? Show your work

c) The shop pays workers $14.25 per hour, plus 5.5% commission. If someone works 18 hours and sells $250 worth of merchandise, what is the total amount of their paycheck for this pay period? Show your work

a= 7.5%12.58= 0.9435 round 0.94+12.58= 13.52

b= 31.50 divided by 19.00= 1.65789474 round 1.66

c= (14.25 x 18)+ (5.5%250)

            l                     l

            v                    v

        256.50 +   13.75 =  270.25

Step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!