The pool is 4 millimeters wide in the drawing. The actual pool is 20 meters wide. What is the scale of the drawing?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Which of the following points is a solution to the system of equations shown? y - x = -1 x + y = -5

Grading scale 1 has the following weights- (tests- 50% quiz- 25% homework- 15% final exam- 10%). calculate your final average if your performance in the class is as follows-test grades- {88, 84, 90, 75, 70, 81); quiz grades- {88, 67, 90, 90, 45, 99, 76, 98, 100}; homework- 90; final exam- 75