Which shows the correct substitution of the values a, b, and from the equation -2= -x + x2 - 4 into the quadratic formula?
b
-4c
Quadratic formula: x=-b
x==(-28V212-42 - 4)
- 1*112-4-1)(-4)
26-1)
-
1
2
-4-1-2)
2(-)
x=-(-274-28-4c22)

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?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b