Answer:
-3
Step-by-step explanation:
no time cause ASAP
To find the LCD first convert all integers and mixed numbers (mixed fractions) into fractions. Then find the least common multiple ( LCM ) of the denominators which is equal to the least common denominator ( LCD ). You can then rewrite each term as an equivalent fraction with the LCD .
Answer:
36
Step-by-step explanation:
We can use combinations
9 choose 2 =
9!/(7!*2!) = (9*8)/2 = 36
