Please help, I don’t get this at all. I will give brainiest!

Answer:
1. 112.5
2. 46.25
3. 22.4
4. 10 5/6
Step-by-step explanation:
All of the questions are asking for the area.
The formula would be L*W = Area for each question(L = Length, W = Width)
Plugin value is where you substitute the Length and Width for each shape.
And the Area would be the answer of the equation.
Here is a practice answer (1):
Formula: L*W = Area
Plugin values: 7 1/2 * 15 = Area
Area: 112.5