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, 20.06.2019 18:04, butterscotchsjoqsvoz
Find an equation (in term of x) of line through the points (-1,3) and (1,4)
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Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.
Answers: 3
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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