orly uses 2 cups of raisins for every 12 cups of trail mix she makes. How many cups of trail mix will she make if she uses 8cups of raisins

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?

Find two numbers if their sum is 91 and the ratio is 6: 7?

Prove that 16^4-2^13-4^5 is divisible by 11.