7. Melissa wants the city to provide every Farrington classroom with recycling bins and is in the process of collecting student signatures for her petition. So far Melissa has collected 82 signatures and wants to collect 15 signatures for each classroom she visits during advisory time. If S is the total number of signatures Melissa has collected, and C is the number of classroom visited, write an equation.

How many solutions does the nonlinear system of equations graphed below have?

Aretha wanted to gather data about the cost of local bowling leagues in her area. she plotted the data and determined that the average bowling league costs consist of a one-time registration fee and a monthly fee modeled by the equation y = 15x + 20. identify and interpret the y-intercept in this model. the y-intercept is 20. this is the cost per month. the y-intercept is 20. this is the cost of registration. the y-intercept is 15. this is the cost of registration. the y-intercept is 15. this is the cost per month.

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?