The triangle to solve for has a leg or 12 feet, hypotenuse of 20 feet, so solve for Pythagoras

for a

a = 16 feet
M <CAE = 360 - 240 = 120 degrees answer
Answer:
All answers in this set can be written in the form y=f(x).
The answer to your question is:
1/3x + 1/2x = x - 9