Answer:
for every 2 biographies you put 1 mystery book until you get to the middle then there will be 3
Step-by-step explanation:
7.5*10*3+6*4*2=273
3 rectangles + 2 triangles (1/2b times height)
Answer: C
Step-by-step explanation: there are 4 different variables (x, y, a, and b)
