Need Help Please! There are 2 questions in this post

[featherann]

1.
Revenue= $15* number of pizzas
Cost= ($4 * number of pizzas) + $55Break even=cost=revenue
How many pizzas must be sold to break even?

I originally had:
4x + 55 = x
4(5) + 55 =
20 + 55 =75
You would need to sell 75 pizzas to break even

2.
How many specialty pizzas would need to be sold to make a profit of $1,100?
Profit = Revenue – Cost
105*15=1,575
(4*105) + 55=475
$1,575 - $475 = $1,100
$1,100 profit

My teacher stated: You have the right equation to solve C but you did not state the correct answer; the answer will be the solution of the equation, not the result of putting the solution into the equation. The same can be said for E.

 

[featherann]

For question 2-what is written down is what I did to solve the equation.

 

[mmm4444bot]

Revenue = $15 * number of pizzas

Cost = $4 * number of pizzas + $55

How many pizzas must be sold to break even?

cost = revenue

4x + 55 = x

You made a mistake on the right-hand side of your equation above.

The revenue is 15x, not x.

Also, it's good form to always state the definition for symbol x by writing on your paper something like the following.

Let x = the number of pizzas

How many specialty pizzas would need to be sold to make a profit of $1,100?
Profit = Revenue – Cost
105*15=1,575
(4*105) + 55=475
$1,575 - $475 = $1,100
$1,100 profit

My teacher stated: You have the right equation to solve C but you did not state the correct answer; the answer will be the solution of the equation, not the result of putting the solution into the equation. The same can be said for E.

I don't know what C and E are, but perhaps your teacher wants you to work with the expressions for Revenue and Cost to first form an equation to solve.

Profit = Revenue - Cost

Substitute your expressions for Profit, Revenue, and Cost into the profit equation above, and then solve for x.

1100 = 15x - (4x + 55)


Cheers :cool: