In the following diagram line C intersects line D. A
21
3x+7
23
<6
24
25
4x+5
5y-29
27
28
3y+19
D
Figure may not be drawn to scale.
A. Using complete sentences, classify the relationship between 27 and 28 created by the intersection of lines C and
D.
B. Use complete sentences to explain how the special angles created by the intersection of lines C and D can be used
to solve for y.
C. Solve for y and find the measures of 27 and 28.

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?