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

Keiko spent the day bird watching and counted 34 more birds in the morning than in the afternoon. If she counted a total of 76 birds, how many birds did she count in the afternoon?

The sum of two numbers is 44, and the larger number is 2 more than the smaller number. What is the smaller number? If x = the smaller number and y = the larger number, then which of the following systems of equations represents the word problem?

Solve x: |x| - 8 = - 5

The ratio of white marbles to blue marbles and jays bag is 2 to 5 if there is there are more than 50 marbles in the bag what is the minimum number of marbles that can be in the bag?

What is the whole number and remainder from 2895 divided by 229

Describe two real life situations that uses parallel lines?

At many golf clubs, a teaching professional provides a free 10-minute lesson to new customers. A golf magazine reports that golf facilities that provide these free lessons gain, on average, $1 comma 700 in green fees, lessons, or equipment

Multiply 8 by the sum of 4 and 2

Which two numbers add up to - 11 that multiply to - 432?

Ou are having a family-barbeque. In attendance are a grandfather, a grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one father-in-law, one mother-in-law and one