A bike shop sells you a bicycle for $63 and a helmet for $21 the total cost is 150% of what the shop spent originally how much did the shop spend originally? How much profit did the bike shop or in by selling the bicycle + helmet to you?

Step-by-step explanation:

Selling price for the shop = 63 + 21 = $84

As given,

Selling price for the shop = 150% of cost price of the shop

∴ 84 = 1.5 * Cost price

∴ Cost price = $56

Profit earned by bike shop = Selling Price - Cost price = 84 - 56 = $28

a) justify

step-by-step explanation:

justifying is just part of everyday life. justify kind of means proof so i think the answer is a) justify.

-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