Answer:
To find the measure of x you want to put 4x+x equaled to 180, because the measure of a straight line is 180, and 4x and x together make a straight line
Set up your equation:
4x+x=180
Add your like terms
5x=180
Divide by 5 to get x by itself
x=36
Hope this helps ;)
80% = 0.8, so it would be:

So, the number of seats filled were 96.
Answer:
3
Step-by-step explanation:
3×1=3 it says 3 three students compete in a meaning 1 spelling bee so they can only place in 3 different places.
This is called the "Additive Identity Property (of Addition)". Any number plus or minus 0 is still that number.


This is reflected in the second equation here.