after the first 3 grading periods, johns math grade were 96,93,90, which means his average grading period grade is 93. john thinks he can find the mean for the entire year by finding the mean of his 4th grading period grade, a 97, and the overall 93 average. is this a correct way for john to find his mean for the entire year

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x