You started with $15 and save eight dollars each week what algebraic expression models the total amount you have

Ihave a 69 and an 82. the 69 is worth 40% of my grade and the 82 is worth 15%. can someone tell me my current average grade.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

Which statement accurately describes how to perform a 90° clockwise rotation of point a (1,4) around the origin?