Let x be the score Amaya gets on the final test. She wants her average of all 3 tests to be between 80 and 89:
<span>80 ≤ (78 + 91 + x) / 3 ≤ 89 </span>
<span>Multiply everything by 3: </span>
<span>240 ≤ 78 + 91 + x ≤ 267 </span>
<span>240 ≤ 169 + x ≤ 267 </span>
<span>Subtract 169 from everything: </span>
<span>240 - 169 ≤ x ≤ 267 - 169 </span>
<span>71 ≤ x ≤ 98 </span>
<span>Answer: </span>
<span>She needs to score between 71 and 98 to get a B for the course.</span>
Work 12-hour dog walking work and work 5 hours as a car wash attendant
This will give 92$
Answer:
9.8
Step-by-step explanation:
Given that a survey of sports fan was conducted counting no of persons whose favourite was football, baseball, basketball and hockey.
Given that 49 like football, 35 baseball, 11 basket ball and 5 hockey
We have to find ratio of football fans to hockey fans.
We find that hockey fans are 5 and football fans are 49
Ratio of football fans to hockey fans =49/5
=9.80
The ratio means if 9.80 football favourite persons are there there would be only one person whose favourite is hockey.
