Two school clubs, a stamp collecting club with 12 members and a coin collecting club with 15 members, will combine to form a single large club. those clubs had no members in common before they combined. the president and vice president of the new club will be selected from the membership of the older clubs, with one of them selected from the stamp collecting club and the other from the coin collecting club. how many different possible selections of president and vice president are there?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

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?