Hiro bought a five-pack of rechargeable batteries last week and an eight-pack
of the same type of batteries this week. He knows the cost of each battery is
the same no matter how many are in a pack. If Hiro spent $5.55 more on the
eight-pack than on the five-pack, how much would a ten-pack cost?

Step-by-step explanation:

Let x represent the cost of each battery since the cost of each battery is the same no matter how many are in a pack.

Hiro bought a five-pack of rechargeable batteries last week and an eight-pack of the same type of batteries this week. It means that the cost of the 5 pack battery is $5x and the cost of the 8 pack battery is $8x.

If Hiro spent $5.55 more on the

eight-pack than on the five-pack, it means that

8x = 5x + 5.5

8x - 5x = 5.5

3x = 5.5

x = 5.5/3 = 1.83

The cost of a 10 pack battery would be

1.83 × 10 = $18.3

i think the correct option is the second option.