You spend $28 on ingredients to make cookies. you charge $4 per container of cookies. how many containers do you need to sell to earn $20 in profit?

Step-by-step explanation:

Let

x-----> the number of containers

we know that

------> equation that represent the situation

Solve for x

Adds both sides

Divide bytex]4[/tex] both sides

32

step-by-step explanation:

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)