Question

Can someone explain the formula for this ..

Gerald needs to purchase baseballs and bats for his youth baseball league. He’ll need at least 25 pieces of equipment, but he only has $615 to spend. Baseballs cost $20 each and bats cost $35 each. Which is a combination of baseballs and bats that Gerald can afford to buy?

16 baseballs and 9 bats

16 baseballs and 8 bats

18 baseballs and 7 bats

18 baseballs and 8 bats

Answer 1

Calculate each line below and see which one(s) are less thatn or equal to $615
16(20) + 9(35)
16(20) + 8(35)
18(20) + 7(35)
18(20) + 8(35)