2. The cost that a carpet cleaning company charges is directly proportional to the number of rooms cleaned. The cost is $22 for each room.
(a) Write a direct variation equation to represent the cost.
(b) How many rooms can a hotel pay the company to clean for $200? Write and solve an equation.
(c) Suppose the hotel plans to tip the carpet cleaners $40, how many rooms can the hotel get cleaned for $200 now? Write and solve an equation.

Respuesta :

a)Direct variation equation: C=22N

b) Number of rooms that will get cleaned for $200 = 9

c) If the hotel plans to tip the carpet cleaners $40, the number of rooms that will get cleaned for $200 = 7

let us say the cost of the carpet cleaning company is C

while the number of rooms is N

what is the constant of proportionality?

The constant of proportionality is the ratio that relates two given values in what is known as a proportional relationship.

a) it is given that

costNumber of rooms

C∝N

C= kN.......(1)

where k is a constant of proportionality.

b)It is given that cost is $22 for each room

put C=$22 and N=1 in equation (1)

So,

k= 22/1 = 22

equation (1) becomes

C=22N

So,

number of rooms a hotel can pay the company to clean for $200 will be

N = C/22 = 200/22 = 9 rooms approx.

c) if the hotel plans to tip the carpet cleaners $40

the total amount that will be considered as a charge will be 200-40= $160

so,

numbers of rooms hotel get cleaned = 160/22 = 7 rooms approx.

therefore,

a)direct variation equation: C=22N

b) number of rooms that will get cleaned for $200 = 9

c) if the hotel plans to tip the carpet cleaners $40, the number of rooms that will get cleaned for $200 = 7

to get more about the constant of proportionality refer to:

https://brainly.com/question/1835116