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.

Quick translate "x is 12 units from 20" into an equation. what are the values of x being described? if you can answer any of my other questions that'd be great too

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .