The coordinates of D(-9,5) under a reflection in the line y=x

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Place the following steps in order to complete the square and solve the quadratic equation,

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.