# exam study math guide CRUICAL

The average of Anne's, Sara's, and Julie's test score is 72. Julie scored 100 and Anne scored 10 points higher than Sara.what were annes and saras scores?

1. 👍 0
2. 👎 0
3. 👁 218
1. Julie's score = 100
Sara's score = x
Anne's score = x + 10

Average = 72 = total of all scores / 3

72 = (100 + x + (x + 10)) / 3
72 = (100 + 2x + 10) / 3
216 = 110 + 2x
x = 53

Sara's score = x = 53
Anne's score = x + 10 = 63

Double check:
(100 + 53 + 63) / 3 = 72

1. 👍 0
2. 👎 0
2. Let x = Sara's score

72 * 3 = 216
216 - 100 = 116

x + x + 10 = 116
2x = 106
x = 53

Check: (53 + 63 + 100)/3 = 72

1. 👍 0
2. 👎 0

## Similar Questions

1. ### math

the avreage of annes saras and julies test score is 72 julie scored 10 and anne scored 10 points higer than sara. what were annes and sara scores?

asked by riley on December 5, 2010
2. ### child care

Which of these descriptions of Julie best depicts growth as it's defined. a. Julie loves to paint with water colors. b.Julie cried when her cat cut it's paw. c. Julie's legs are four times as long as they were when she was born.

asked by Cynthia on December 14, 2008
3. ### statistics

A teacher finds that the test scores of a group of 40 students have a mean of 75 and a standard deviation of 10. If Anne has a test score of 88, what is Anne’s z-score?

asked by latisha on November 14, 2013
4. ### Math

Julie scored 50 points in a game. How many points did Leonora score if she scored p points less than Julie in terms of p?

asked by Clara on November 24, 2016
5. ### Statistics. I Need Help Please

George scored a 62 on his AP World History test and had a z-score of -3.75. Julie is also in the class with George and scored an 83 on the same test, with a z-score of 1.5. From this information, FIND THE CLASS mean and standard

asked by Mary on June 6, 2011
6. ### Language Arts

1. Part A: What can you infer from these lines of dialogue in The Diary Of Anne Frank, Act I? MRS. FRANK: But I'd like to stay with you... very much. Really. ANNE: I'd rather you didn't. A: There are problems in Anne's

asked by Cy on March 5, 2018
7. ### math

The average of 5 numbers is 28. What would the 6th number have to be to bring the average up to 30? Anne’s average in math is 92. She wants to raise her average to 93 so she will make an A. she is taking a test on Friday. What

asked by katherine on March 14, 2011
8. ### Languaga Arts

4. What conclusion can you draw from Anne and Peter’s interaction at the beginning of Scene 3? (1 point) a.Anne finds Peter’s behavior embarrassing. b.Anne is standoffish toward Peter, which hurts his feelings. c.Peter is

asked by Amy on March 10, 2014
9. ### english 11

4. Which of the following statements about Anne Bradstreet is NOT true? (1 point)Anne Bradstreet was never married. Anne Bradstreet was the first published poet in America. Anne Bradstreet was born and educated in England. Anne

asked by josh on August 23, 2012