The correct answer would be -8-i! :)
Commutative property of addition is when 3+9=12 and 9+3=12.
Answer:
8
Step-by-step explanation:
Substitute 3 for x
-2x + 14
-2(3) + 14
-6 + 14 = 8
Answer:
A. Use the two-sample t-methods when a sample was taken from each of two populations (i.e. two groups being compared) and the population standard deviations are not known.
Step-by-step explanation:
T-distribution:
When the population standard deviation is not known, the t-distribution is used.
If a sample was taken from one population, we use the one-sample method, while if there is a comparison of two populations, the two-sample method is used, and thus, the correct answer is given by option A.
Difference is subtraction.
"The subtraction of 4 times a number (4x) and nine"
This means you subtract 4x by 9
4x - 9
