You have 27 out of the total of 300 raffle tickets sold so you have a (\( \frac{27}{300} \)) x 100 = \( \frac{27 \times 100}{300} \) = \( \frac{2700}{300} \) = 9% chance to win the raffle.

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:

6c² - 8c²
(6 - 8)c²
-2c²

If the tiger has consumed 65 pounds of food in 5 days that's \( \frac{65}{5} \) = 13 pounds of food per day. The tiger needs to consume 156 - 65 = 91 more pounds of food to reach 156 pounds total. At 13 pounds of food per day that's \( \frac{91}{13} \) = 7 more days.

The ratio of football cards to baseball cards is 9:2 and the ratio of baseball cards to basketball cards is 9:1. To solve this problem, we need the baseball card side of each ratio to be equal so we need to rewrite the ratios in terms of a common number of baseball cards. (Think of this like finding the common denominator when adding fractions.) The ratio of football to baseball cards can also be written as 81:18 and the ratio of baseball cards to basketball cards as 18:2. So, the ratio of football cards to basketball cards is football:baseball, baseball:basketball or 81:18, 18:2 which reduces to 81:2.

The greatest common factor (GCF) is the greatest factor that divides two integers.