Answer:
I'll do each section below
Explanation:
First question = 15
I'm going to assume that P and Q are equal so your equation would be:
8x+4 = 124
(-4 from both sides) => 8x = 120
(divide by 8 both sides) => x=15
Second question = 129
Angles on a straight line = 180 so your equation is:
5x+4+2x+1 = 180
(simplify) 7x+5 = 180
(-5) 7x = 175
(divide by 7) x = 25
Now since you are finding the obtuse angle you substitute this into 5x+4 and you should get 129
Third question = angle y
Adjacent just means next to so in this case the angle next to angle z is angle y
Hope this all helped, have a great day! :)