Answer:
x^2 - x - 12 (this is the second answer choice)
Step-by-step explanation:
Multiply (x + 3)(x - 4) and simplify the result:
x^2 - 4x + 3x - 12, or x^2 - x - 12 (this is the second answer choice)
Answer: 9
Step-by-step explanation:
Formula : Mean = 
Given: 5 students participated in a push-up competition.
The amount of push-ups each student completed is listed: 12, 7, 10, 11,5.
Mean = 

Hence, the mean number of push-ups = 9
Answer:
6:20 PM
Step-by-step explanation:
They got there at 8:30 PM, and 2 hours and 10 minutes prior would have been 6:20 PM.
Answer:
c. 40 cubic cm
Step-by-step explanation:
5 x 2 x 4 = 40 cm