The grade of a hill is it's steepness represented as a percent. Jin tracks his walking speed up different hills . what does the rate of change or slope represent in the situation

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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.

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20