A roller-coaster car has a potential energy of 800 kJ and a kinetic energy of 170 kJ at point A in its travel. At the low point of the ride, the potential energy is zero, and 60 J of work have been done against friction since it left point A. What is the kinetic energy of the roller-coaster at its low point?

i don't see nikolas work.

step-by-step explanation:

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

chicken chicken chicken

step-by-step explanation:

its a trick question

step-by-step explanation:

dogs love water, just turn on the hose and it will run in circles chasing the water all day : )