.. A train is traveling at a constant speed, and its distance over time is
shown in the graph. What is the speed
of the train?

How many different ways can you make change for $.50 using only nickels,dimes, and quarters?

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?