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lesya692 [45]
3 years ago
5

Diego has two jobs. He works 3 hours at the library each day, making $8 per hour. In addition, he works at a coffee shop, making

$7.50 per hour. At the coffee shop, he works more than 4 hours but less than 7 hours
each day Diego needs to make at least $70 daily to afford his living expenses.
Which of the following systems represents the constraints given in this scenario?
Let I represent the number of hours he works at the library
and c represent the number of hours he works at the coffee shop.

A: l = 3
4 < c < 7
8l + 7.50 ≥ 70

B: l = 3
4 ≤ c ≤ 7
8l + 7.50 ≥ 70

C: 1 = 3
4 ≤ c ≤ 7
7.50l + 8c ≤ 70

D: 1=3
4 < c < 7
7.50l + 8c ≥ 70
Mathematics
1 answer:
Zepler [3.9K]3 years ago
3 0

Answer:

  • D.  l = 3  ||  4 < c < y   ||  8l + 7.5c ≥ 70

Step-by-step explanation:

<h3>Work at library</h3>
  • Time  = 3 hours ⇒ l = 3
  • Payment = $8 per hour
  • Total payment = 8l
<h3>Work at coffee shop</h3>
  • Time = between 4 and 7 hours ⇒ 4 < c < 7
  • Payment = $7.5 per hour
  • Total payment = 7.5c

Target income = at least $70 daily  

<u>So the system as per above parameters:</u>

  • l = 3
  • 4 < c < y
  • 8l + 7.5c ≥ 70

Correct option is D

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