Concept explainers
Find the number of $15 entrees was ordered.
Answer to Problem 15CCSR
The number of $15 entrée is 20.
Explanation of Solution
Given:
A dinner party at a restaurant had 37 people. Each person ordered one of two entries. One entrée cost $15, and the other entry cost $18. The total cost of all the entries was $606. How many $15 entrees were ordered?
Concept Used:
Total number of people = 37
Let x number of people ordered the $15 entrée and (37 − x) number of people ordered the $18 entrée. Total cost of all entries was $606.
The equation:
Calculation:
Let x number of people ordered the $15 entrée
(37 − x) number of people ordered the $18 The equation:
Now solve for x:
Thus, the number of $15 entrée is 20.
Chapter 11 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
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