In the diagram, the measures of 21, 24, and 25 are 120". The measure of 27 is 60'. Are lines cand d parallel?
e
1
2
3
4
5/6
7/8
A. No, because 21 and 27 are not congruent.
B. No, because 24 and 27 are not congruent.
C. Yes, because 21 and 25 are congruent.
D. Yes, because 21 and 24 are congruent.

In a certain pentagon, the interior angles are a, b,c, d,e where a, b,c, d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).