Answer:
51
Step-by-step explanation:
12+39=51
A = bh (the last one)
To find the area of a parallelogram, multiply the base by the height. The formula is: A = B * H where B is the base, H is the height, and * means multiply. The base and height of a parallelogram must be perpendicular.
A. 9
B. 7
24r^−5s^0 would be your answer
