To find:
a. Solve an inequality to find the range of the score that you need on the last test to get a B.
b. What score do you need if the fifth test counts double?
Answer to Problem 119AYU
a. If you get at least 74 you can get score a grade of B
b. If you get at least 37 you can get score a grade of B
Explanation of Solution
Given:
You have scores of 68, 82, 87, and 89 on the first four of five tests. To get a grade of B, the average of the first five test scores must be greater than or equal to 80 and less than 90.
Calculation:
If average score is 80 to 90
Since it is impossible to make over 100
If you get at least 74 you can get score a grade of B
If the fifth test count double
If you get at least 37 you can get score a grade of B
Chapter A.9 Solutions
Precalculus Enhanced with Graphing Utilities
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College Algebra (7th Edition)
Elementary Statistics (13th Edition)
Thinking Mathematically (6th Edition)
Elementary Statistics: Picturing the World (7th Edition)
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