
Concept explainers
(a)
To write and solve: a proportion for the number of cell phones with keyboards which are added in the store.
(a)

Answer to Problem 35PPS
5 cell phones are added to the store.
Explanation of Solution
Given:
Total cell phones = 120
45 have keyboards
40% of stock has keyboards
Calculation:
Let x should be added to the store’s inventory.
Conclusion:
Therefore, 5 cell phones are added to the store.
(b)
To find: the total number of cell phones in stock
(b)

Answer to Problem 35PPS
125 cellphones will be in the store
Explanation of Solution
Given:
Total cell phones = 120
45 have keyboards
40% of stock has keyboards
Calculation:
As there are 120 cell phones in the store, the number of phones added to the store is 5.
So,
125 will be the total number of cell phone in stock.
Conclusion:
Therefore, 125 cellphones will be in the store
Chapter 7 Solutions
Pre-Algebra, Student Edition
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