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professor190 [17]
3 years ago
8

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.
Mathematics
2 answers:
tankabanditka [31]3 years ago
7 0
(a) y=22x
(b) 200=22x
      9.09=x   (round down to whole number)
      9=x
(c) 200=22x+40
      160=22x
      7.27=x     (round down)
      7=x
kvv77 [185]3 years ago
5 0
<span>The cost that a carpet cleaning company charges is directly proportional to the number of rooms cleaned. The cost is $22 for each room.</span>
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Given,

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Move 6000 to right hand side and change its sign

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⇒\sf{Interest = \: 8550 \: }

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<u>Finding </u><u>the </u><u>rate </u>

{ \boxed{ \sf{Rate =  \frac{Interest \times 100}{Principal \times Time}}}}

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⇒\sf{ Rate = \frac{8550  \times 100}{6000 \times 10} }

Calculate

⇒\sf{Rate =  \frac{855000}{60000} }

⇒\sf{Rate = 14.25 \: \% \: }

Hope I helped!

Best regards!!

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