Mathematics, 13.01.2020 20:31 zuleiny38

The average (arithmetic mean) of four numbers is 4a + 16. when a fifth number is added, the average becomes 5a + 20. the fifth number is

a. a - 4
b. a + 4
c. 4a + 4
d. 4a + 16
e. 9a + 36

Answers: 1

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The average (arithmetic mean) of four numbers is 4a + 16. when a fifth number is added, the average...