x=cost of tickets for adults y=cost of tickets for kids...
You know that they sold 900 tickets, which means the combination of x and y equals 900. Therefore one equation is... x+y=900 We also have to take care of the second equation... We know that 13x represents the total cost of ADULT tickets We know 7y represents the total cost for the children... Which means... 13x+7y=11000 There are you equations! (bolded)
Her error was dividing them by 2 she would place 1.25 over 5 then divide by 5 to get the unit rate per minute then multiply the quotient by 2 to get the rate of degrees moved for 2 minutes which is .5 or .50 degrees every two minutes.
