Which ordered pairs in the form (x, y)(x, y) are solutions to the equation 3x−4y=213x−4y=21 ?

select each correct answer.

(11, 3)(11, 3)

(−1, −6)(−1, −6)

(7, 0)(7, 0)

(−3, 3)

plz i have no idea what this is

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same