just like the previous one, we sum the sides to get the perimeter.

Answer:
You didn't ask a question.
Step-by-step explanation:
Answer:
The slope is -2
Step-by-step explanation:
Since the roof is decreasing in height as it goes forward, I know that the slope must be negative. The equation to find the slope is rise/run. The vertical change, or the rise, is -6 feet, so that value goes on top of the fraction. The horizontal value, or the run, is 3 feet so that goes on the bottom of the fraction.
Now our fraction is 
If you simplify that fraction, you'll get -2.
Answer:
<QPR = 98.5 degrees
Step-by-step explanation:
a line = 180 degrees
7x + 4 + 9x - 40 = 180
16x - 36 = 180
16x = 216
x = 13.5
<QPR = 7x + 4 = 7(13.5) + 4 = 98.5