Solve each system of equations 1.) 2x- 5y = 7 2.) 8x + 5y = 6 3.) 8x + 5y = 1 4.) 3x + y = 5

3x - y = -9 2x + 3y = -2 -4x - 3y= 1 -2x + 2y = 6

Which inequality has a dashed boundary line when graphed ?

Which table shows a proportional relationship between miles traveled and gas used?

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?