Question

He ratio of number of cookies to cost of cookies is 15:915:915, colon, 9. Let's find an equivalent ratio that shows the cost for 111 cookie. Hint #22 / 4 A ratio where one of the terms is 111 is called a unit rate. We can divide the number of cookies by 151515 to get to 111 cookie. Hint #33 / 4 \$\blueD9\div15=\$0.60$9÷15=$0.60dollar sign, start color #11accd, 9, end color #11accd, divided by, 15, equals, dollar sign, 0, point, 60 Hint #44 / 4 The cost of 111 cookie is \$0.60$0.60dollar sign, 0, point, 60.

Answer 1

$0.60

Explanation:

Given that:

The ratio of number of cookies to the cost of cookies as:

Number of cookies : Cost of cookies = 15 : 9

It means, we get 15
`x` number of cookies when we pay $9
`x`.

To find:

An equivalent ratio to represent the cost of 1 cookie.

Solution:

Here, we have to find nothing but the unit price or the price of 1 cookie.

This can simply be done by dividing the total cost of cookies with the total number of cookies.

Total cost of 15
`x` cookies is given as $9
`x`

Using unitary method:

Let us divide both the sides with 15
`x`, we get:

Total cost of
`(15x)/(15x)` cookies is given as
`(\$9x)/(15x)`

Total cost of 1 cookie is given as $0.60