1 and 2 I hope this help you :)
1... the wording is a little confusing.
Is the charge $0.18 per mile or is it actually $36.18 per mile?
A * b = 30
a - b = 1
a + b = 11
take ur last 2 equations, and add them
a - b = 1
a + b = 11
--------------add
2a = 12
a = 12/2
a = 6
now its just a matter of subbing
a + b = 11
6 + b = 11
b = 11 - 6
b = 5
so a = 6 and b = 5...whose product is 30, whose difference is 1, and whose sum is 11.
1/a
The b^-3 in the denominator and numerator cancel out
The answer is B 13.5 miles
