Triangles DEP and D'E'F' are shown on the coordinate plane below: D
F
E
D
-8
-2-
E
F
What rotation was applied to triangle DEF to create triangle D'E'F'?
None of the above
90° counterclockwise
180°
90° clockwise

Astudent received the following grades last semester. find the student's semester grade point average. an a is algebra (3 credits), a b in history ( 3 credits), a in sociology ( 3 credits) a d in english ( 3credits) and a c in seminar ( 2credits). an a is worth 4 points, a b is worth 3 points a c is worth 2 points and a d is worth 1 point.

Quadrilateral wxyz is on a coordinate plane. segment yz is on the line x+y=7 and segment xw is on the line x+y=3. which statement proves how segments yz and xw are related

Find dy/dx using implicit differentiation ln(20+e^xy)=y