SOLUTION:

We are to calculate the shaded area of the given shape.

CONCEPT:

This is a triangle that a rectangle was cut out from.

To calculate the shaded area of the given shape, we are to find the area of the triangle and then subtract the area of the recangle that was cut out.

The shaded area = Area of the triangle - Area of the rectangle

**Answer: 40 sit ups**

**Step-by-step explanation:**

50+70+80+80+40+60+40= 420 ÷ 7 = 60

I'm pretty sure it's the second and third one!

14 students play a brass instrument :)

**Answer:**

-3.44

**Step-by-step explanation:**

The expression will equal 28.1 when x= -3.44. Any value of x , except when x= -3.44 , will make the expression equal to 28.1