Selena gomez’s gym membership cost $180 to sign up and then charges $6 for each visit. demi lovato’s gym membership cost $160 to sign up and then charges $8 for each visit at how many visits will they have to spent to the same amount of money?

Acarnival sold tickets for $1.50 for adults and $1.00 for students. there were 54 tickets sold for a total of $70.50. write a system of equations to represent the number of adult tickets,x, and the number of student tickets,y. find the solution and explain what it means. i'll you if you me

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?