Today each cookie costs 0.75 less than the normal price. pight now if you buy 7 of them it will only cost you 2.80 . writw an equationd to determine the normal price of each cookie(c)

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,

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

the radius is 2 times the diameter.

step-by-step explanation:

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.