Could you guys help me?

I'll do each section below

Step-by-step 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! :)

b. the decimal could be two-tenths.

step-by-step explanation: