In 45 minutes time, Juan rode his horse for a total of 12 miles. He claims that his horse was traveling at 16 miles per hour. What assumption must Juan make for his claim to be true? a: His horse made a rest stop.
b: His horse traveled at a constant speed.
c: His horse traveled in a straight line.
d: His horse's speed varied throughout the ride.​

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.

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

If the value of cos330°is√3/2 then find cos 165°.