Question

The estimated total cost, y, of a child's toy is partially based on the number of batteries used,

The toy itself costs $12. Which equation represents the situation?
The cost of one battery is $0.75.
y = 12x +0.75
y = 0.75x + 12
y = 12x - 0.75
y = 0.75x - 12

Answer 1

Explanation:

its number B

Answer 2

`y = 0.75x + 12`

Explanation:

`y`: total cost

`x`: number of batteries

If the toy costs $12, the total cost must be those $12 plus the amount of money spent in the batteries.

Money spent in batteries:

`0.75x`

this is because each battery costs $0.75, is he uses
`x` amount of batteries he must pay the
`0.75x`

Thus, the total cost is

`y = 0.75x + 12`

which is the cost of the batteries and the cost of the toy added together.