3/4x = 3 I don't know how to solve

x=4

Step-by-step explanation:

I changed 3 into an equivalent improper fraction by putting a 1 underneath it.

3/4 x = 3/1

For 3/4 to be equal to 3/1 you need to find how many times 3/4 goes into 3/1. So you must change the denominators to be equal. To do this you must find the least common multiple. Which is 4.

To double check work.

Replace x with 4.

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;