Step-by-step explanation:
Hope it helps you in your learning process.
141.999 rounded to the nearest
tenth = 142
hundreth =142
ten = 140
hundred = 100
P=69 degrees
Q=71 degrees
R=40 degrees
Explanation
All triangles equal up to 180 degrees.
First add all numbers without x.
Then add all xs.
5x+20=180
Subtract 20 from 180
5x=160
Divide 160 by 5
x=40