Answer:
90/200
Step-by-step:
Kahn Academy marked it correct
I think the answer would be $9.46 left as a tip for the waiter.
Fractions that have the same number on the bottom have a "common denominator."
Those are adjacent angles. They equal 180 degrees.
10x-20+6x+8= 180
16x-12=180
Add 12.
16x= 192
x=12
I hope this helps!
~kaikers
