The Downtown Community Barbecue served 280 dinners. A child’s plate cost $2.60 and an adult’s plate cost $9.50. A total of $1,797.50 was collected. How many of each type of plate was served? Round answers to the nearest whole person.

child plates were served.
adult plates were served.

Solve the system of equations. y= 2x y= x^2 - 15

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.