A cellular phone service company charges 20 cents for each minute or part of a minute of airtime. If the total charge y in cents is a function of the number of minutes x that Cora uses her phone, what is the range of this function?

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

Can someone tell me if this is perpendicular? !