Explanation Given Information: The score of Rosa on the first three tests were 80 , 100 , 86 and to get A on four tests, the required average is 90 . Formula used: The average of the given data/numbers is, S n = A Where, S is the sum of numbers, n is the total number of numbers and A is the average of the numbers. Calculation: Consider the sum of scores on four tests is S , the score on four test to maintain A is x , the total number of test is n and the average on four test to get an A is A . The total number of tests n is 4

9th Edition

ISBN: 9780321997173

Author: Marvin L. Bittinger, Judith A. Beecher

Publisher: PEARSON

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Chapter 5.1, Problem 7DE

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To calculate: The lowest score that Rosa can get on the last test and still get an A if to get and A un math, Rosa must score an average of 90 on four tests and on the first three tests, her scores were 80,100 and 86.

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Chapter 5.1, Problem 6DE

Chapter 5.1, Problem 8DE

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Chapter 5 Solutions

Developmental Mathematics (9th Edition)

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The lowest score that Rosa can get on the last test and still get an A if to get and A un math, Rosa must score an average of 90 on four tests and on the first three tests, her scores were 80,100 and 86.

Solution Summary: The author calculates the lowest score that Rosa can get on the last test and still get an A if to get and A un math.

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To calculate: The lowest score that Rosa can get on the last test and still get an A if to get and A un math, Rosa must score an average of 90 on four tests and on the first three tests, her scores were 80,100 and 86.

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Chapter 5 Solutions