construct on a singe diagram, a triangle PQR;PQ=7cm ,QR=8.2cm angle Q=120 degrees. Locus of points that are 3.6cm from PQ and on the same side of PQ as R

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

Extra points! find the missing dimension! need asap

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?