To find the average of these 4 numbers add them together then divide by 4:

\( \frac{16 + 12 + 16 + 12}{4} \) = \( \frac{56}{4} \) = 14

The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.

To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:

\( \frac{2y^5}{7y^4} \)
\( \frac{2}{7} \) y^{(5 - 4)}
\(\frac{2}{7}\)y

To multiply terms with radicals, multiply the coefficients and radicands separately:

5\( \sqrt{2} \) x 2\( \sqrt{9} \)
(5 x 2)\( \sqrt{2 \times 9} \)
10\( \sqrt{18} \)

Now we need to simplify the radical:

10\( \sqrt{18} \)
10\( \sqrt{2 \times 9} \)
10\( \sqrt{2 \times 3^2} \)
(10)(3)\( \sqrt{2} \)
30\( \sqrt{2} \)

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