Answer:
A
Step-by-step explanation:
Change the mixed numbers to improper fractions
7 
= 
6 
= 
The subtraction is then
-
Both fractions have a common denominator so subtract the numerators leaving the denominator
= 
= 
→ A
Answer:
2.
Step-by-step explanation:
1+1=2
So each 1 revolution it travels the distance around the rim of the wheele aka circumference
circumference=pi times diameter
diameter=21
circunference=pi times 21 or 21pi
so distance=number of revolutions times circunference
number of revolutions=3
subsitute
distance=3 times 21pi
distance=63pi
answer is 63pi
or aprox pi to 3.14 and do 63 times 3.14=197.82
aprox 197.82 inches
The answer is -3 because -3+2=-1 then -1(4)=-4
