Question

HELP PLEASE! THIS IS DUE TOMORROW! GIVING OUT 20 PTS!

Lucy's grade for her science class will be the average of her Unit 1 and Unit 2 tests and
her Unit 3 project. If she got a 91 on her Unit 1 test and an 88 on her Unit 2 test, what must
she score on her project to earn a 90 average?

Answer 1

Answer:91

Explanation:

Formula for average is: (Unit 1 + Unit 2 + Unit 3) / 3

If we plug the values in we get

(91 + 88 + x) / 3 = 90

(179 + x) / 3 = 90

*3 *3

179 + x = 270

x = 91