Mathematics, 24.08.2020 02:01 itscheesycheedar
Israel started to solve a radical equation in this way: square root of x plus 6 β 4 = x square root of x plus 6 β 4 + 4 = x + 4 square root of x plus 6 = x + 4 (square root of x plus 6)2 = (x + 4)2 x + 6 = x2 + 8x + 16 x + 6 β 6 = x2 + 8x + 16 β 6 x = x2 + 8x + 10 x β x = x2 + 8x + 10 β x 0 = x2 + 7x + 10 0 = (x + 2)(x + 5) x + 2 = 0 x + 5 = 0 x + 2 β 2 = 0 β 2 x + 5 β 5 = 0 β 5 x = β2 x = β5 Solutions = β2, β5 What error did Israel make? A. He subtracted 6 before subtracting x. B. He added 4 before squaring both sides. C. He factored x2 + 7x + 10 incorrectly. D. He did not check for extraneous solutions.
Answers: 1
Mathematics, 21.06.2019 16:00
Select the correct answer. in the figure, angle k measures 45Β°. what is the measurement of angle c? a. 38Β° b. 45Β° c. 90Β° d. 98Β°
Answers: 2
Mathematics, 21.06.2019 20:00
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?
Answers: 1
Israel started to solve a radical equation in this way: square root of x plus 6 β 4 = x square root...
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