Question

Help me with my math plz

Answer 1

You could solve this by finding the area of the WHOLE figure and subtracting the piece that is taken out.
The area of the WHOLE rectangle is 18 * 15 = 270.
The area of the piece taken out is 9 * 10 = 90.
270 - 90 = 180 in^2

Answer 2

Let's separate this shape into three parts. A smaller rectangle at the top, and one at the bottom, and a bigger rectangle in the middle.

The smaller rectangle at the top:

The equation to find the area of a rectangle is
(a = area, l = lenght, w = width)

a = l · w
Put in the values
a = 18 · 3
a = 54

Since the smaller rectangle at the bottom has the same length and width, it has the same area. 

The bigger rectangle in the middle:

a = l · w
Put in the values
a = 8 · 9
a = 72

Now add all of the areas together to get the answer!

72 + 54 + 54 = 180

The answer is 180 :)

Hopefully this helps! If you have any more questions or don't understand, feel free to DM me, and I'll get back to you ASAP! :)