There are 22 threatened species of reptiles in the uniter states, how many ways can you chooses 4 to write about

Factor the polynomial. b^2 + 4b + 4

Solve the system of equations. 2x-2y=-4 and x+y=8. show work

Acafeteria manager can choose from among six side dishes for the lunch menu: applesauce, broccoli, corn, dumplings, egg rolls, or french fries. he used a computer program to randomly select three dishes for monday's lunch. what is the theoretical probability the applesauce and broccoli will both be offered monday?