Answer:
Step-by-step explanation:
1) Find the common denominator.
2) Multiply everything by the common denominator.
3) Simplify.
4) Check the answer(s) to make sure there isn't an extraneous solution.
Customary is a system of measurement used in the U.S. like feet, inches, etc.
Find a common denominator between 12 and 9
it would be 36
9*4=36
12*3=36
1*3=3
7*4=28
3/36 + 28/36 = 31/36
1. analyze data presented
It is not d because it is not greater than 80 degrees
it is not a because it is clearly not 10 degrees
making system of equations
8x+(4x+60)=180
addition
12x+60=180
move sixty to the other side
12x=120
division
x=10
Angle BEC=*x, so 8x=80
Answer: 80 degrees
