You have 18 out of the total of 200 raffle tickets sold so you have a (\( \frac{18}{200} \)) x 100 = \( \frac{18 \times 100}{200} \) = \( \frac{1800}{200} \) = 9% chance to win the raffle.

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

4 + (4 + 2) ÷ 5 x 4 - 2²
P: 4 + (6) ÷ 5 x 4 - 2²
E: 4 + 6 ÷ 5 x 4 - 4
MD: 4 + \( \frac{6}{5} \) x 4 - 4
MD: 4 + \( \frac{24}{5} \) - 4
AS: \( \frac{20}{5} \) + \( \frac{24}{5} \) - 4
AS: \( \frac{44}{5} \) - 4
AS: \( \frac{44 - 20}{5} \)
\( \frac{24}{5} \)
4\(\frac{4}{5}\)

To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:

-8a² - 8a²
(-8 - 8)a²
-16a²

Calculate the number of vans needed by dividing the number of people that need transported by the capacity of one van:

vans = \( \frac{35}{14} \) = 2\(\frac{1}{2}\)

So, it will take 2 full vans and one partially full van to transport the entire team making a total of 3 vans.

The amount of flour you need is (2\(\frac{7}{8}\) - \(\frac{1}{8}\)) cups. Rewrite the quantities so they share a common denominator and subtract:

(\( \frac{23}{8} \) - \( \frac{1}{8} \)) cups
\( \frac{22}{8} \) cups
2\(\frac{3}{4}\) cups