Which function's graph has a period of 2?

y=cos (x-pi/2)

y=3cos pi x

y=2 sin 3x

y=-4 sin 2x

Slope for (6,-10) (-15,15)

A box contains 5 plain pencils and 7 pens. A second box contains 4 color pencils and 4 crayons. One item from each box is chosen at random.

Simplify: - 5/4 divided by 2 3/5

Use the base of the grassy area to find the approximate area of the circular garden use pi = 3.14 what's the answer?

Round 43.18 cm to the nearest tenth of a centimetre, and to the nearest centimetre?

Michelle has some stamps, her sister has half as many stamps as she does. they have 1080 stamps in all. How many stamps does Michelle have?

791,030 written in standard form

Your car can drive 28 miles on 1 gallon of gas. How many miles can your car go with a full tank of 12 gallons?

Donald has a coin collection. He has 36 dimes, 72 quarters, and 18 nickels. He wants to arrange them into equal groups with only one type of coin in each group. How many can he put in each group? a. 1 b. 2 c. 3 d. 4 E. 9 F. 12

Three piles of 7 beans each are to be made from 10 red, 5 yellow, and 6 green beans. If all of the beans must be used and each stack must contain at least one bean of each color, then what is the maximum number of red beans that can be put in one of