Answer:
A; ?; Line 3
Step-by-step explanation:
Question 1:
-30 divided by -6 is 5.
The negatives cancel each other out.
And 30 divided by 6 is simply 5.
Question 2:

Do the operation inside the parenthesis first:

Divide. 12 does not go into 62 evenly. 12 times 5 is 60, so the answer is 5 remainder 2:

Or in fractions:

(Was there a typo? From what you've given me, the correct answer is not listed.)
Question 3:
So we have to following steps:

The mistake is in Line 3. Danny cannot just combine 5+6(2) into 11(2). Instead, he should multiply 6(2) and then add. Thus, the correct solution is:

Example A: a/2
A fraction shows division as well! I’m not sure about the rest though....
X^2-10x+25 = (x-5)^2 or (x-5)(x-5)
45 feet. you just need to find the perimeter which is just adding all the sides. 8+15+12+10=45
Answer:
F because you cannot prove that any of the angles are the same with only one set of parallel lines