Homework Help: pre-algebra

Posted by cody on Friday, June 24, 2011 at 10:29am.

Solve, show the algebraic you use. Tammy has the following scores on her business law tests 92, 99, 84, 91. What score must she earn on her fifth test in order to have an A average? An A for her university starts at 90.

pre-algebra - Ms. Sue, Friday, June 24, 2011 at 11:02am
92 + 99 + 84 + 91 = 366

500 * 0.9 = 450

450 - 366 = ?
pre-algebra - cody, Friday, June 24, 2011 at 12:10pm
Ms. Sue, wher did you come up with 500*0.9?
pre-algebra - Ms. Sue, Friday, June 24, 2011 at 12:13pm
The total possible points for 5 tests is 500. 90% of 500 = 450. Tammy needs a total score of 450 to get a 90% average.
pre-algebra - cody, Friday, June 24, 2011 at 12:16pm
Thank you, 450-366=84
pre-algebra - Ms. Sue, Friday, June 24, 2011 at 12:53pm
You're welcome.

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