DIRECTIONS: Enter your answer as an ordered pair: (? , ?) What is the x-intercept of the line 7x - 4y = 28

(0, 4 )

Step-by-step explanation:

To find the x- intercept, let y = 0 in the equation and solve for x, that is

7x - 4(0) = 28, that is

7x = 28 ( divide both sides by 7 )

x = 4 ← x- intercept ⇒ (0, 4 ) as an ordered pair

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;