The Apex answer is 54%. Hope this helps! ^ your answer would have been right but you forgot to multiply 25% with the second half of the asked question.
Step-by-step explanation:
3x+12=45
3x=45-12
3x=33
3x/3=33/3
x=11
Angles 1, 3, and 4 make up a straight line.
Thus, 3x + 90 + 3x - 6 = 180 (angle sum of straight line)
6x - 6 = 90
6x = 96
x = 16
Now angle 1 becomes 3(16) = 48
Angle 1, 2, and 3 also make up a straight line.
Thus, angle 2 + 48 + 90 = 180
angle 2 + 138 = 180
angle 2, therefore, becomes 42. In essence, (A)
Usually the easiest way to solve this is by using a calculator. Of course only if your teacher allows you too.
