If one endpoint of a line segment is (-2, 7) and the midpoint of the segment is (4, -1), find the other endpoint. (with solution please)

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Aparking lot is to be 400 feet wide and 370 feet deep. how many standard-sized cars fit in this lot considering a double-loaded (w4) two way traffic set up, an angle of 90° and a sw of 9’ 0’’? (do not consider handicapped parking spaces, and consider 15’ for turning aisles). show your work.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees