(6x to the second power +7x) + (5-2 to the second power +9x)

4x^2+16x+5

Step-by-step explanation:

(6x^2+7x)+(5-2x^2+9x)

6x^2-2x^2+7x+9x+5

4x^2+16x+5

y=3n + 1

step-by-step explanation:

this is wrong because it says the second number is one less and i added one instead

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;