20. which of the following is the correct first step to solve 5x2 – 20x = -15 by completing the square?
o divide all terms by 5.
o divide all terms by -5.
add 15 to both sides.
add 100 to both sides.
5%
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20. Which of the following is the correct first step to solve 5x2 – 20x = -15 by completing the square?

O Divide all terms by 5.  this is the answer

O Divide all terms by -5.

Add 15 to both sides.

Add 100 to both sides.

5%

Step-by-step explanation:

answer: asdfghjkl,mnbv

step-by-step explanation:

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;