Melissa made $252 for 18 hours of work. At the same rate, how much would she make for 13 hours of work

How do you use the elimination method for this question? explain, because i really want to understand!

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

Einstein office equipment has a rental plan for office machines. a fax machine that lists for $722.98 can be rented for 22% of the price annually. the state imposes a usage charge of 3.2%. if stephen hawking travel decides to rent the fax machine, what will its total monthly rental charge be?