SOLUTION: solve. please show the algebraic inequality you used and show all of your work. tammy has the following scores on her business law test 92,99,84,91. what score must she earn on her

Algebra ->  Linear-equations -> SOLUTION: solve. please show the algebraic inequality you used and show all of your work. tammy has the following scores on her business law test 92,99,84,91. what score must she earn on her      Log On


   

Question 456443: solve. please show the algebraic inequality you used and show all of your work. tammy has the following scores on her business law test 92,99,84,91. what score must she earn on her fifth test order to have an A average? An A her university starts at 90.
Found 2 solutions by rfer, josmiceli:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
(92+99+84+91+x)/5=>90
366+x=>90*5
366+x=>450
x=>450-366
x=>84

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = grade she must have on 5th
test to get an A average
+%2892+%2B+99+%2B+84+%2B+91+%2B+x%29+%2F+5+=+90+
+92+%2B+99+%2B+84+%2B+91+%2B+x+=+450+
+366+%2B+x+=+450+
+x+=+450+-+366+
+x+=+84+
An 84 on the 5th
test will give her an A average