In order for Tom to earn a B in his math class, his test scores must average at least 80. On the first 5 tests, he has an average of 77. There is one test remaining, what is the minimum Tom needs to earn a B?
He will need to end with at least 80 x 6 = 480 points
His average is now 77: 77 x 5 = 385 points
So, he will need: 480 - 385 = 95 points [Good luck!]