Consider u = {x|x is a positive integer greater than 1}. which is an empty set?
a. {x|x ∈ u andone-half is prime}
b.{x|x ∈ u and 2x is prime}
c. {x|x ∈ u andone-half can be written as a fraction}
d. {x|x ∈ u and 2x can be written as a fraction}

Write the pair of fractions as a pair of fractions with a common denominator

In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d. what is the height of the tide after 93 hours?

The quotient of 15 and a number is 1 over 3 written as an equation