There are 21 students participating in a mathematics competition. how many ways can the students who go first and second be chosen?

Arunning track in the shape of an oval is shown. the ends of the track form semicircles. a running track is shown. the left and right edges of the track are identical curves. the top and bottom edges of the track are straight lines. the track has width 56 m and length of one straight edge 130 m. what is the perimeter of the inside of the track? (π = 3.14) 260.00 m 347.92 m 372.00 m 435.84 m

Match each polynomial with its factorization.

Give all possible names for the line shown.calculation tip: lines can be written with either point first.