Simplify
2x + x + x + 2y x 3

4x+6y

Step-by-step explanation:

Simplify the expression. 4x+6y

4x+6y

Step-by-step explanation:

I hope you understand it now. The multiplication is only for the 2y. 2x+x+x=4x

2y × 3= 6y

So it will be 4x+6y.

It's easy isn't it?

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;

step-by-step explanation: