A waterfall is n times the height of its picture on a postcard. Which equation represents the height, y, of the waterfall if
the picture is 6 cm tall?

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

Combine like terms to make a simpler expression 3z+z

What is the correct decimal form of 12%