Suppose that when a cell phone store charges 20$ for a car charger, it sells 115 units. When it drops the price to 19$ it sells 120 units. Assume that demand is a linear function of price. If each phone charger costs 1$ to make, what price should the store charge to maximize its profit? If x is the number of times the price is reduced by one dollar.
Find a function for a total profit with respect to.
A negative value will mean the price is increased.

f(x)= ?
Price to maximize profit = 22

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step-by-step explanation:

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b

step-by-step explanation:

the radius is 2 times the diameter.

step-by-step explanation:

the correct answer option is (2x-3)(2x+3).

step-by-step explanation:

we are given the following expression and we are to factorize it:

we are to find such factors that when multiplied they give a result of 36 (9 x 4 = 36) and when added they give a result of 0.

the two such factors of 36 are negative six and postive six.

factorizing the given expression to get:

therefore, the correct factorization of is (2x-3)(2x+3).