Saturday

February 28, 2015

February 28, 2015

Posted by **Kahlil** on Wednesday, November 9, 2011 at 6:14pm.

- Algebra -
**Steve**, Wednesday, November 9, 2011 at 8:39pmIf Newton had 20 students and Euclid had e students,

total points = 20*90 + e*80

total students = 20+e

total average = (20*90 + e*80)/(20+e) = 85

1800 + 80e = 1700 + 85e

100 = 5e

e = 20

Makes sense. 85 is halfway between 80 and 90, so there must have bee the same number of students in each class.

- Algebra -
**Daniel**, Thursday, November 8, 2012 at 6:46pmLuisa mows lawns during the summer. She charges $15 if she cuts the grass but charges $5 more if she also trims the grass. Last week she trimmed 5 more yards than she cut. If she made $415 last week, how many yards did she trim?

**Answer this Question**

**Related Questions**

Algebra - Ms Newton's class took the same test as Mr. Euclid's students. Ms. ...

math hw - 10.Thirty students in a chemistry class took a test on which the ...

Help math!! - 15 students took a science test. the average score was 88.0. later...

math - 15 students took a science test. the average score was 88.0. later in the...

Algebra - The 22 students present for a recent test in Ms. Huang’s class had an ...

math - In his NPR radio program "A Prairie Home Companion," Garrison Keillor ...

algebra 2 - The average (arithmetic mean) of the test scores of class of a class...

statistics - At a local high school students were randomly assigned to one of ...

algebra - students in a biology class just took a final exam. a formula for ...

Statistics - A student wants to test her hypothesis she gives each of her ...