The answer is D. The country will fall apart without it.
When I grow up I either want my career to be a comedian or an engineer. My only obstacle with becoming a comedian is that my parents are so stubborn and won’t give me consent, they say my react time to slow and I will not be able to come up with jokes. But I think I can take on that project!
The answer would be 15.
The first equation would be ∠1 = 15°
Then the second equation is ∠2 = (3 * 15 + 30)° which simplifies to 75°
And since complementary angles need to equal 90° to be true we have to add both angles. So, ∠1 (= 15°) + ∠2 (= 75°) = 90°. Now that we know they equal 90°, 15 would be the answer to your problem.
