Halp... ;^; Which statements are true about the ordered pair (7, 19) and the system of equations?

{2x−y=−5x+3y=22

Select EACH correct answer.

A. The ordered pair (7, 19) is a solution to the first equation because it makes the first equation true.

B. The ordered pair (7, 19) is a solution to the second equation because it makes the second equation true.

C. The ordered pair (7, 19) is not a solution to the system because it makes at least one of the equations false.

D. The ordered pair (7, 19) is a solution to the system because it makes both equations true.

List the elements of the set in roster notation. (enter empty or ∅ for the empty set.) {x | x is a letter in the word hippopotamus}

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?

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?