What is the sum of the polynomials?

17m-12n-1
+4-13m-12n


a)4m + 3
b)4m – 24n + 3
c)30m – 5
d)30m – 24n – 5

Scarlet bought three pairs of sunglasses and two shirts for $81 and paula bought one pair of sunglasses and five shirts for $105 what is the cost of one pair of sunglasses and one shirt?

Could someone with number 1 and 2

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day