6) a student scored an 88, s2, and 76 on three math tests. what does the student need to get on the fourth test to have an average of 85 for all four tests? james wants to use algebra to solve this problem. which equation should he use? 256 4x 85 256 x 85 85 x 256 256 85x

The circumference of a circle is 5 pi cm. what is the area of the circle?

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.