Abe has a bag of marbles and wants to divide them into sets. the first set will have 2 marbles; the second set, 5; the third set, 8; the fourth set, 11; and so on. how many sets will he have if he starts with 40 marbles?

Officer brimberry wrote 24 tickets for traffic violations last week, but only 9 tickets this week. what is the percent decrease? give your answer to the nearest tenth of a percent.

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?