Asystem of equations is given below:
y = 4x – 3
2x + 7y = 41
which of the following steps could be used to solve by substitution? (4 points)
2(y = 4x – 3) + 7y = 41
4x – 3 = 2x + 7y
2x + 7(4x – 3) = 41
2(y = 4x – 3)

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

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?

(c) a vine called the mile-a-minute weed is known for growing at a very fast rate. it can grow up to 0.5 ft per day. how fast in inches per hour can the mile-a-minute weed grow up to? show your work using the correct conversion factors.