Brian earns $28.50 tutoring for 3 hours. Assuming he is paid at constant rate, how much would Brian earn tutoring for 18 hours?

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.

What line represents the relationship between r and s