This is not middle school work
Answer:
28
Step-by-step explanation:
Add the top and bottom bases, divide by 2, multiply by height.
Answer:
The picture is really blurry, i can't see the questions
Answer:
LAST OPTION: 
Step-by-step explanation:
For this exercise it is important to remember the Power of a power property, which states that:

The expression given in the exercise is:

Therefore, in order to simplify it, you must apply the Power of a power property explained before.
Then, you get the following expression:

As you can notice, the expression obtained matches with the expression provided in the last option.
Answer: It’s C, “x+12=30; x=18 students”
Step-by-step explanation:
If Mr. Wilson has 12 more students than Mr. Star, whatever Mr. Star has (x) plus 12, should equal 30. That would make x, or the amount of students Mr. Star has, 18. This answer is included in option C.