Incorrect Rafael purchased a prepaid phone card for \( \$ 25.00 \). Calls cost 7 cents a minute using this card. The credit, \( C \) (In dollars), left on the card after it is used for minutes of calls is given by the following. How much credit is left on the card after Rafael uses it for 50 minutes of calls?

Find \( -\frac{8}{15}-3 \frac{4}{5} \). Write your answer as a mixed number in simplest form.

QUESTION TWO Express each of the following as a single, simplified fraction. 2.1. \( \frac{4}{9}-\frac{2}{3}+\frac{7}{12} \) 2.2. \( \frac{-8}{13} \times \frac{5}{24} \div-\frac{25}{13} \) 2.3. \( \left(\frac{3}{7}+\frac{1}{4}\right) \times\left(2-\frac{69}{38}\right) \)

Find \( \frac{5}{6}-\left(-\frac{3}{4}\right) \). Write your answer as a mixed number in simplest form.

c) \( 8+(-18): 3= \)

Find \( -\frac{7}{8}-2 \frac{1}{6} \). Write your answer as a mixed number in simplest form