Answer:
x = 13.5°
Step-by-step explanation:
Angles 2 + 3 = a straight line, so 180°
180 - 66 = 114 = angle 2
114 = 10x - 21
114 + 21 = 10x
135 = 10x
135 / 10 = x
13.5 = x
No
X would have to equal 6 or greater as if x was 5
5+3 is the same as 8
The answer is 6(x^2 -1) I have provided a picture with my work and the answer
4 6-2 = 4 you subtract the largest and smallest number to get the answer