What is the value of 7(4 + x) when x = 5?

Step-by-step explanation:

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Plug the value of x and simplify :

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Add the numbers : 4 and 5

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Multiply 7 by 9

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The price to make maximum revenue is 1 and the maximum revenue is 2000.

Step-by-step explanation:

Consider the provided information.

Revenue is the product of the number of sales and the sales price.

Here, is the price of a cookie and the number of cookies sold is .

The above equation is a quadratic equation and the graph of the above equation will be a downward parabola because the coefficient of is negative.

The vertex(axis of symmetry) of a downward parabola has the maximum point.

The axis of symmetry is    for the quadratic equation .

By compare Revenue equation with , we get:

Now put the respective values in the formula .

So revenue will be maximum for .

Now put in

Hence, the price to make maximum revenue is 1 and the maximum revenue is 2000.