Find the arithmetic mean between,6 and 8.

Identify the common difference of an arithmetic sequence given that a₁ = 3 and a₅ = 11.

Find the mean of the first 5 even numbers.

Find the arithmetic mean between,$3\sqrt{5}$ and $5\sqrt{5}$ .

Identify the common difference of an arithmetic sequence given that a₁=5 and a₁₅=75.

Find the arithmetic mean of the data set, 8, 10, 12, 14, and 16.

 Identify the common difference of an arithmetic sequence given that a₁=10 and a₂₀=200.

 Find the arithmetic mean between,$1-x+x^2$ and $1+x+x^2$.

Find the arithmetic mean of the data set, 4, 5, 6, 7, and 8.

Is the sentence true or false?

The arithmetic mean of 12 and 10 is 11.