Talia's gym membership costs $75 a month plus $30 additional for each month she brings a guest. Which equation shows the number of months Talia brings a guest if she spends $990 on a one year membership?

Answer:75 × 12 + 30m = 990∴ m = 3Step-by-step explanation:Assume the number of months Talia brings a guest to be 'm'.So the amount of Talia has to pay for guests for one year is $ 30m .So, total amount of money Talia has pay for one year = (monthly membership cost)×(number of months in a year) + (additional amount for guests)Total cost = $990Monthly membership cost = $75Number of months in a year = 12Additional amount for guests = $ 30m∴ The equation which gives you the number of moths she brought guests is:990 = 75×12 + 30m990 = 900 + 30m990-900 = 30m30m = 90∴ m = 3