Answer:
Step-by-step explanation:

Step 1: Subtract 4 form both sides
Step 2: Multiply both sides by (-3). when we are multiplying by (-3) the < will change to >.

Answer:
Inequality:
83 ≤ (82 + 86 + 84 + x)/4 ≤ 87
Step-by-step explanation:
You must collect no less than 80 and no more than 96 pop tabs.
Answer:
the mean
Step-by-step explanation:
mean is calculated average
Answer:
c. 50
Step-by-step explanation:
count each full block and every block that is more than half full as 1 each, ignore every block that is less than half full.
I got exactly 50 using this method before looking at the available answers.
In multiple choice math problems try to ignore the possible answers until you have determined what you think it ought to be. If the answer you found is in the list you have more confidence you are right, if the answer you got is not in the list you know you did something wrong... just a hint :)
15 is equal to x divided by 3 plus 7