In order to get an A in a class, your test scores must average at least 92%. On the first 6 tests, you have an average of 91%. What score do you need to get on the last test to earn an A?
7 * 92 = 644
6 * 91 = 546
644 - 546 = 98
6 * 91 = 546
644 - 546 = 98