Suppose you have 3 quizzes and want an average of 7 points. list at-least 5 ways this average can be achieved. each score can be no higher than 10 points.

You can start from the trivial case: you get 7 points per quiz. So, your marks are 7, 7, 7 and the average is obviously 7.

From here, you can build as many examples as you like: we need a total score of 21 distributed among the three quizzes: for example, you can choose

4, 9, 8, since 4+9+8=21, or

6, 7, 8, since 6+7+8=21

and so on.

john earns $14.00 for two hours of work.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb