D. Only has 3 numbers in the 5-9 range, while the histogram shows 4. Hope this helps :)
6+4• (5-7)^2
(5-7)^2
-2^2
4
6+4+4
=14
Distribute the 2 to get the pink box
10x + 2y = 18
Then if we are subtracting the bottom equation from the pink box
10x + 2y = 18
-(10x -7y = -18)
9y = 36
y = 4
10-D
12- A
first of all find the area of the whole rectangular:
3+3=6
3*6=18
then small one
3*3= 9
18-9 =9
