What number does someone need on the next test to keep the 81 mean if the past 3 tests had 59, 87, 97

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

1. how do you convert the repeating, nonterminating decimal 0. to a fraction? explain the process as you solve the problem.