Let ∠1, ∠2, and ∠3 have the following relationships. ∠1 and ∠2 are adjacent right angles. ∠1 and ∠3 are vertical angles. what is the measure of ∠1 plus the measure of ∠3 minus the measure of ∠2?

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.