A group of friends go on a 3-hr bike ride together. They ride 15 km with the wind at their backs and then 15 km straight into the wind. The wind adds or subtracts 3 km/hr from their speed. Calculate the average speed of the group of friends with no wind.

The equation respenting the left table is

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.

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?