What is the area in square inches of a rectangle with the dimensions shown in the diagram below?

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?