On a long-distance biking trip, annike started biking at 7 a. m., and her average speed was 11 miles per hour. celia started at 8 a. m., and her average speed was 14 miles per hour

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5