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

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

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

\( \frac{1}{9} \) x \( \frac{9}{2} \) = \( \frac{1 x 9}{9 x 2} \) = \( \frac{9}{18} \) = \(\frac{1}{2}\)

By buying two shirts, Monty will save $18 x \( \frac{50}{100} \) = \( \frac{$18 x 50}{100} \) = \( \frac{$900}{100} \) = $9.00 on the second shirt.

So, his total cost will be
$18.00 + ($18.00 - $9.00)
$18.00 + $9.00
$27.00

You have 32 out of the total of 400 raffle tickets sold so you have a (\( \frac{32}{400} \)) x 100 = \( \frac{32 \times 100}{400} \) = \( \frac{3200}{400} \) = 8% chance to win the raffle.

To subtract these radicals together their radicands must be the same:

9\( \sqrt{125} \) - 6\( \sqrt{5} \)
9\( \sqrt{25 \times 5} \) - 6\( \sqrt{5} \)
9\( \sqrt{5^2 \times 5} \) - 6\( \sqrt{5} \)
(9)(5)\( \sqrt{5} \) - 6\( \sqrt{5} \)
45\( \sqrt{5} \) - 6\( \sqrt{5} \)

Now that the radicands are identical, you can subtract them:

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

-z⁵ x 4z²
(-1 x 4)z^{(5 + 2)}
-4z⁷