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

\( \frac{49\sqrt{45}}{7\sqrt{9}} \)
\( \frac{49}{7} \) \( \sqrt{\frac{45}{9}} \)
7 \( \sqrt{5} \)

To divide fractions, invert the second fraction and then multiply:

\( \frac{2}{9} \) ÷ \( \frac{1}{7} \) = \( \frac{2}{9} \) x \( \frac{7}{1} \)

To multiply fractions, multiply the numerators together and then multiply the denominators together:

\( \frac{2}{9} \) x \( \frac{7}{1} \) = \( \frac{2 x 7}{9 x 1} \) = \( \frac{14}{9} \) = 1\(\frac{5}{9}\)

Use PEMDAS (Parentheses, Exponents, Multipy/Divide, Add/Subtract):

4 + (4 + 4) ÷ 2 x 5 - 5²
P: 4 + (8) ÷ 2 x 5 - 5²
E: 4 + 8 ÷ 2 x 5 - 25
MD: 4 + \( \frac{8}{2} \) x 5 - 25
MD: 4 + \( \frac{40}{2} \) - 25
AS: \( \frac{8}{2} \) + \( \frac{40}{2} \) - 25
AS: \( \frac{48}{2} \) - 25
AS: \( \frac{48 - 50}{2} \)
\( \frac{-2}{2} \)
-1

A factor is a positive integer that divides evenly into a given number. For example, the factors of 8 are 1, 2, 4, and 8.

The equation for this sequence is:

a_n = a_n-1 + 3

where n is the term's order in the sequence, a_n is the value of the term, and a_n-1 is the value of the term before a_n. This makes the next number:

a₆ = a₅ + 3
a₆ = 13 + 3
a₆ = 16