You earned the following scores on five science tests: 75, 82, 90,84, and 71. You want to have an average score of at least 80 after you take the sixth test.

Question

You earned the following scores on five science tests:  75, 82, 90,84, and 71.  You want to have an average score of at least 80 after you take the sixth test.

a.  Write and solve an inequality to find the possible schores that you can earn on your sixth test in order to meet your goal.

Bosnian · Answer

( 75 + 82 + 90 + 84 + 71 + n ) / 6 > OR = 80 Multiplly both sides by 6 75 + 82 + 90 + 84 + 71 + n > OR = 6 * 80 402 + n > OR = 480 n > OR = 480 - 402 n > OR = 78