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

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

mnkjn

step-by-step explanation: