Question

Money needed to raising $1000, selling cookies for $3 a dozen. how many cookies need to be sold to raise $1000?

Answer 1

Let "x" represent the number of dozens sold, if each dozen is sold for $3, then "3x" represents the amount earned after selling "x" dozens of cookies.

You need to raise $1000 by selling cookies, then:

$3x=1000$

Divide both sides by 3

$\begin{gathered} \frac{3x}{3}=\frac{1000}{3} \\ x=333.33\cong334 \end{gathered}$

You need to sell approximately 334 dozens of cookies to raise $1000.

Multiply the result by 12 to calculate the number of cookies:

$333.33*12=4000$

You have to sell 4000 cookies.