"last month, carmen paid a gas and electric utility bill of $55. the electricity part of the bill was $20. write the ratio of the payment for gas to the payment for electricity.
what is the ratio of the payment for gas to the payment for electricity? "

Is the open sentence 5x-2=3x+2 true when x=2? justify your answer.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126