Identify the expression equivalent to 2x + 8 by substituting x = 7 and x = 5. a. 2x + 10 + 10 b. 2(x + 2) c. (x + 4) + (x + 4) d. (x + 4) e. 2(2x + 4)

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

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?

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c