The difference between two numbers is 9. the first number plus twice the other number is 27.find the two numbers.

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

Using elimination, what is -4x+2y=-12 4x+8y=-24

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same