Answer:
Step-by-step explanation:

Product of a number and its multiplicative inverse should be equal to 1.
So,

Answer:
Your right the answer is B a=60
, b=120
A ratio of 1:2 just means one value is twice that of the other.
Answer:
$12.86 per 1ft2
Step-by-step explanation:
divide when determining the unit rate
180/14=12.8571428571 or (rounded to the nearest hundredths) 12.86
Total =45
Black hair=21*360/45=168
Blonde=11*360/45=88
Brown=9*360/45=72
Red=4*360/45=32