Resuelve por el método de suma y resta, por el método de sustitución y por el método de igualación (realiza el procedimiento de cada método) el siguiente
problema:
La suma de dos números es igual a 17 y su diferencia es igual a 1.
x + y = 17
x – y = 1

POR FAVOR AYUDA ES PARA HOY A MAS TARDAR LAS 5:00 p.m.

The ticket price that maximizes revenue is $50.

The maximum monthly revenue is $250,000.

Step-by-step explanation:

We have to write a function that describes the revenue of the airline.

We know one point of this function: when the price is $30, the amount of passengers is 7000.

We also know that for an increase of $1 in the ticket price, the amount of passengers will decrease by 100.

Then, we can write the revenue as the multiplication of price and passengers:

where x is the variation in the price of the ticket.

Then, if we derive R in function of x, and equal to 0, we will have the value of x that maximizes the revenue.

We know that the increment in price (from the $30 level) that maximizes the revenue is $20, so the price should be:

The maximum monthly revenue is: