Question

to receive a b in his chemistry class, mateo needs to earn an average score from 80 to 89, inclusive. his grade is based only on 3 tests. the highest possible score on each of these tests is 100 points. he scored 79 on his first test and 95 on his second test. if y represents his score on the third test, which of the inequalities below shows all values of y that would earn mateo a b in his chemistry class?

Answer 1

66 ≦ y < 93

Explanation:

The lowest possible average grade is 80

80 x 3 = 240

240 - 79 - 95 = 66

The highest possible average grade to get a B is 89

89 x 3 = 267

267 - 79 - 95 = 93