Answer:
b
Step-by-step explanation:
18 (goes down): 17, 16, 15
12 (goes up): 13, 14, 15
The shortest height at which the two stacks of boxes will be the same height is 15.
Hope I was able to help!
Answer:
A & B
Step-by-step explanation:
A is spot-on because of the use of distributive property. B by the use of like terms.
Answer:
C. 
Step-by-step explanation:
You can use the formula to find the slope: 
(-1.5, 1.5) & (1.5, 0)

The slope is 
Answer:
a) The number of students who enjoy reading only.