Maria scored 72, 97, and 82 on her first three math tests. She wants to have a mean score of 82 for the quarter. How many points

Question

Hunter-Best [27]

4 years ago

8

Maria scored 72, 97, and 82 on her first three math tests. She wants to have a mean score of 82 for the quarter. How many points

does she need on her last test to earn an 82 for the quarter

Mathematics

2 answers:

Natalka [10] · Answer 1 · 2022-02-11T11:09:32+03:00

Natalka [10]4 years ago

8 0

Equation to solve: (72+97+82+p)/4 = 82

72+97+82+p = 82*4 = 328 => p = 328-72-97-82 = 77

egoroff_w [7] · Answer 2 · 2022-02-11T13:30:05+03:00

egoroff_w [7]4 years ago

6 0

72+97+82+ X/ 4 = 82 72+97+82+X = 328 You multiply both sides by 4 because you are trying to isolate the variable. Then add up the values, 251+X= 328. Then subtract 251 from both sides too get X=77.