The ore the answer is B. Why?
Because (-4m+1) + (7m-9) = 3m - 8
You add -4m and 7m and get 3m and the only answer that has a POSITIVE 3m is B.
Anyways, you still have to check it. 1+(-9) is -8. So A+B = 3m - 8
Answer:
B) All Real Numbers greater than or equal to 0 and less than or equal to 9
Area = pi*r^2
3.14*3^2=28.26cm^2
