Which situation can be represented by the inequality 4x − 25 ≤ 125?
a. frank bought four tires for x dollars each. he had a coupon for a $25 discount. the total came to less than or equal to $125.
b. frank bought four tires for x dollars each. he paid $25 in shipping for a total less than or equal to $125.
c. frank bought 25 tires for x dollars each. he paid $4 in shipping for a total less than or equal to $125.
d. frank bought x tires for $25 each. he paid $4 in tax for a total less than or equal to $125.