Register
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
235k views
3 votes
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

User Reformy
by
7.1k points

2 Answers

5 votes
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.
User Robmclarty
by
8.8k points
4 votes
equation to solve: (72+97+82+p)/4 = 82

72+97+82+p = 82*4 = 328 => p = 328-72-97-82 = 77
User Kblau
by
7.9k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.5m questions

12.2m answers

Other Questions

How do you can you solve this problem 37 + y = 87; y =
What is .725 as a fraction
A bathtub is being filled with water. After 3 minutes 4/5 of the tub is full. Assuming the rate is constant, how much longer will it take to fill the tub?
i have a field 60m long and 110 wide going to be paved i ordered 660000000cm cubed of cement  how thick must the cement be to cover field
Write words to match the expression. 24- ( 6+3)
Link Copied!