SOLUTION: Jessica needs to have an average of 89 percent on her math tests to get an A-. If her scores are 83%, 89%, 90%, and 92%, what must she score on the next test to maintain an A-?

Question 780087: Jessica needs to have an average of 89 percent on her math tests to get an A-. If her scores are 83%, 89%, 90%, and 92%, what must she score on the next test to maintain an A-?
This is off a study sheet for a test I have to take before electrical school. I just need to know steps on how to do it. We've tried getting the average and find whats missing but we got stuck.
Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

Jessica needs to have an average of 89 percent on her math tests to get an A-. If her scores are 83%, 89%, 90%, and 92%, what must she score on the next test to maintain an A-?
This is off a study sheet for a test I have to take before electrical school. I just need to know steps on how to do it. We've tried getting the average and find whats missing but we got stuck.

Let score on next test that'll yield an 89% or an "A" average be F

Then:

Solve for F.

Then do a check!!

Further help is available, online or in-person, for a fee, obviously. Send comments, �thank-yous,� and inquiries to �D� at MathMadEzy@aol.com
RELATED QUESTIONS
Paula needs to have an average of 90 to keep her rank in the roll. If she scored 86, 92,... (answered by jorel1380)

Your grades in your math class on the last five tests are 83, 92, 78, 96, and 89 and you... (answered by Grinnell)

Carmen was excited about the possibility of earning the "Mayfield Math Award." In order... (answered by addingup)

Jessica would like to get an A in her algebra class. To do so, she must have an average... (answered by ewatrrr)

Jessica would like to get an A in her algebra class. To do so, she must have an average... (answered by solver91311)

how would I solve this pre-alg. question ? odina'a scores on the first three of four... (answered by TimothyLamb)

To get an A in her math course, Tina needs, the average of five tests to be at least 90.... (answered by macston)

how to write linear inequality for- On her last two math tests, Leah had scores of 83 and (answered by MathLover1)