Use the quadratic formula to find the exact solutions of x2 − 9x + 5 = 0.

x equals negative b plus or minus the square root of b squared minus 4 times a times c, all over 2 times a

x equals negative 9 plus or minus the square root of 101, all over 2
x equals 9 plus or minus the square root of 101, all over 2
x equals negative 9 plus or minus the square root of 61, all over 2
x equals 9 plus or minus the square root of 61, all over 2

Based on what i know about mean, this doesn't add up.

(08.01)consider the following pair of equations: x + y = −2 y = 2x + 10 if the two equations are graphed, at what point do the lines representing the two equations intersect? (−4, 2) (4, 2) (−2, 4) (2, 4)

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?