Which method (graphing, substitution or elimination) would you use to solve the system of equations x = y +11 and 2x + y = 19 and why. ​

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters