Answer:
18
Step-by-step explanation:
hope this helps you out
Answer:
132
Step-by-step explanation:
That is an 180 degree angle so just do:
180-42=a
a=132
Answer:
2r+1+(-4r)+7
= -2r+8
= -2(r+4)
Step-by-step explanation:
This is the definition of a rational number.