Rewrite 7 - 9 as an equivalent addition expression:

7 + 9
-7 + 9
7 + (-9)
-7 + (-9)

The area of a rectangle is 54x^9y^8 square yards.if the length of the rectangle is 6x^3y^4 yards,which expression represents the width of the rectangle in yards

Which point is a solution to y s 4x + 5?

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?