Which shows the correct substitution of the values a, b, and c from the equation 0 =-3x2 - 2x + 6 into the quadratic
formula?
quadratic formula: x= -bib? - 4ac
2a
10x=
2) iv (-2)2 - 4(-3)(6)
26-3)
-2
v22 - 4(-3)(6)
21-3)
)
/(-2)2 - 4(3)(6)
2(3)
_-2122 - 4(3)(6)
2 (3)

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.

Which graph correctly shows the solution of the compound inequality 4x < 16 or 11x > 121? -2 0 2 4 6 8 10 12 14 10 -2 0 2 4 6 8 10 12 14 lll0 -2 0 2 4 6 8 10 12 14 -2 0 2 4 6 8 10 12 14