At Tall Timbers Tree Farm, customers can pay to cut their own fir or pine trees. During the first weekend of December, 43 pine trees were sold. The farm sold 97 trees in all that weekend.

Let f represent how many fir trees the farm sold.

Alexandra drew two adjacent angles that form a right angle. A right angle is 90°. The measure of one of the angles is 24°.

Let m represent the measure of the second angle.

Which equation models the problem?

Grayson is painting a bright blue accent wall in his bedroom. Grayson already painted 48 square feet of the wall. He still has 36 square feet left to paint.

Let a represent the total area of the wall.

Which equation models the problem?

Coral reefs have always fascinated Colton. This summer, he is travelling to Australia, and he can't wait to see the Great Barrier Reef! Colton paid $578.45 in total for a scuba diving class and a new underwater camera.

The camera cost $199.98.

Let s represent the cost of the class. Which equation models the problem?