On the beach I found 3 blue shells, 7 green shells and 5 yellow shells. Hov many shells did I find in all?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

The pair of coordinates that do not represent the point( 5,150’) is a. (5,-210) b. (5,210) c. (-5,330) d. (-5,-30)

According to a survey by the beach lifeguards, there is a 25% chance that surfers will see a dolphin while surfing. which simulation could you use to answer questions about whether a surfer will see a dolphin?