Stephanie scored 88, 70, 84, and 72 on her first four science tests. What score does Stephanie need on her fifth science test to receive a mean score of 80?

can you give me the steps to solve this im practicing for hsa

6 answers

What is hsa?

She has a total of 314 points now.

After the fifth test, the total points possible is 500.

0.8 * 500 = 400

400 - 314 = 86

She'll need an 86% to get a mean score of 80.
high school assessment and thank you
how did you get 500 possible points?
and where did you get 0.8?
Mean = ∑x/n

80 = (88+70+84+72+x)/5 = ?
=86 ok thank you i get it know