Adrawer is filled with 7 black shirts,5 white shirts,10 gray shirts. one shirt is chosen at random from the drawer. find the probability that it is not a gray shirt.

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

With alll of except for the 2 that i did already

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