Respuesta :
The normal price of each cookie is $1.15 derived from the equation, c =today price of each cookie + 0.75
Solution:
Given, Today each cookie costs 0.75 less than the normal price.
Right now if you buy 7 of them it will only cost you 2.80
We have to write an equation to determine the normal price of each cookie(c)
And, we are given that, today 7 cookies cost 2.80
Let the cost of one cookie today be “n”
Then we get,
Today 7 cookies ⇒ 2.8
Then, 1 cookie ⇒ n
By criss cross multiplication we get,
[tex]\begin{array}{l}{7 \times n=2.8 \times 1} \\\\ {\rightarrow 7 n=2.8} \\\\ {\rightarrow n=0.4}\end{array}[/tex]
Which means that, each cookie costs $0.4 today
Now, we know that,
normal price of each cookie, c = today price of each cookie + $ 0.75
c = 0.4 + 0.75
c= 1.15
Hence, the normal cost of each cookie is $1.15 derived from the equation, c = today price of each cookie + 0.75
