Answer:
B
Step-by-step explanation:
Complementary angles sum to 90°. Supplementary angles sum to 180°.
Answer:
ABC
Step-by-step explanation:
EF = 50 in.
In similar figures, corresponding sides are proportional. We use the similarity statement ABCD~EFGH to write a proportion:

Cross multiply the proportion:
45*x = 75*30
45x = 2250
Divide both sides by 45:
45x/45 = 2250/45
x = 50