Problema Solution
) The cost of a taxi in NYC is $2.5 plus 40 cents for each 1/5 mile. How far could you travel for at least $8.50 but not more than $12.50?
Answer provided by our tutors
let 'x' be the distance in miles I could travel then we have
8.50 < = 2.50 + 0.4*x/5 < = 12.50
6 < = 0.4x/5 <= 10 multiply both sides by 5/0.4
30/0.4 <= x <= 50/0.4
75 <= x <= 125
I could travel not less than 75 miles and not more than 125 miles.