Question

*HELP*

the cost of oranges varies directly with the amount bought. If 7 oranges cost $7. 70, how much will fifteen oranges cost?

Answer 1

If 7 oranges cost $7.70, then the cost of 15 oranges is $16.50.

We have,

The number of oranges purchased varies directly as the price of the oranges.

If the cost of 7 oranges is $7.70.

It is required to find the cost of 15 oranges.

As their is direct relation between number and oranges and price.

So,

The cost of 1 orange is
`(7.70)/(7)`.

For finding the cost of 15 oranges, multiply 15 by
`(7.70)/(7)` such that,

`\text{C}=15*(7.70)/(7)`

`\text{C}=16.50`

So, If 7 oranges cost $7.70, then the cost of 15 oranges is $16.50.