A square picture has a frame that is 3 inches thick all the way around. The total side length of the picture and frame is \(x\) inches.

Which expression represents the area of the square picture, without the frame? If you get stuck, try sketching a diagram.

The revenue from a youth league baseball game depends on the price per ticket, \(x\).

Here is a graph that represents the revenue function, \(R\).

Graph of a function, origin O. Horizontal axis, 0 to 40, by 5s, ticket price, dollars. Vertical axis, 0 to 1400, by 200s, revenue, dollars. Parabola opens downward, starting at 0 comma 0, vertex at around 15 comma 1100, ending at 30 comma 0.

Select all the true statements.

A garden designer designed a square decorative pool. The pool is surrounded by a walkway.

On two opposite sides of the pool, the walkway is 8 feet. On the other two opposite sides, the walkway is 10 feet.

Here is a diagram of the design.​​​​​​

The final design for the pool and walkway covers a total area of 1,440 square feet.

1. The side length of the square pool is \(x\). Write an expression that represents:

   1. the total length of the rectangle (including the pool and walkway)
   2. the total width of the rectangle (including the pool and walkway)
   3. the total area of the pool and walkway
2. Write an equation of the form: \(\text{your expression}=1,\!440\). What does a solution to the equation mean in this situation?

Right triangle \(ABC\) is shown.

Select all expressions that are equal to the length of side \(BC\).

Triangle \(ABC\) and its medians are shown. Write an equation for median \(AE\).