Answer:

Step-by-step explanation:
Convert any whole numbers to improper fractions

Find the LCM of the denominators and use multiplication to change the denominators to the LCM

Subtract

Simplify

can be simplified to
so the answer is 
A= 80
b= 100
c= 100
a is the same as the 80° already shown and to get b you have to subtract 80 from 180
Answer:
6
Step-by-step explanation:
there are 6 -10's in -60 feet