Skylar's grades on four math tests are 85, 78, 77, and 69. What does Skylar need to score on the next test in order to have a mean score of 80? A) 83. B) 90. C) 91

Question

asked Dec 4, 2017 127k views

2 Answers

← Prev Question Next Question →

Ask a Question

Hossein Mousavi · Answer 1 · 2017-12-09T08:18:52+0000

(85 + 78 + 77 + 69 + x) / 5 = 80
(309 + x)/5 = 80
309 + x = 80 * 5
309 + x = 400
x = 400 - 309
x = 91 <== skylar needs to score a 91 to have an average of 80

Skylar's grades on four math tests are 85, 78, 77, and 69. What does Skylar need to score on the next test in order to have a mean score of 80? A) 83. B) 90. C) 91

Please log in or register to add a comment.

Please log in or register to answer this question.

2 Answers

Please log in or register to add a comment.

Please log in or register to add a comment.

Related questions

Categories

Other Questions