Alexa pays 7/20 of a dollar for each minute she uses her pay-as-you-go phone for a call, and 2/5 of a dollar for each minute of data she uses. this month, she used a total of 85 minutes and the bill was $31. which statements are true? check all that apply. the system of equations is x + y = 31 and 7/20x +2/5y =85 the system of equations is x + y = 85 and 7/20x +2/5y =31 to eliminate the y-variable from the equations, you can multiply the equation with the fractions by 5 and leave the other equation as it is. to eliminate the x-variable from the equations, you can multiply the equation with the fractions by 20 and multiply the other equation by -7. she used 25 minutes for calling and 60 minutes for data. she used 60 minutes for calling and 25 minutes for data. she used 20 minutes for calling and 11 minutes for data. she used 11 minutes for calling and 20 minutes for data.