Joseph has a loyalty card good for a 9% discount at his local grocery store. What would his total in dollars and cents be, after the discount and before tax, if the total cost of all the items he wants to buy is 37? Round to the nearest cent.

해법

J ose p h ha s a l oy a lt y c a r d g oo d f or a 9% d i sco u n t a t hi s l oc a l g rocery s t ore . Wha t w o u l d hi s t o t a l in d o ll a rs an d ce n t s b e, a f t er t h e d i sco u n t an d b e f ore t a x, i f t h e t o t a l cos t o f a ll t h e i t e m s h e w an t s t o b u y i s 37 ? R o u n d t o t h e n e a res t ce n t .

Amount after discount : 33.67

솔루션 단계

Translate the problem into an equation:

x = 37 - 0.09 \cdot 37

x = 37 - 0.09 \cdot 37 : x = 33.67

Amount after discount : 33.67