10C4 represent the Combinations of 10 objects taken 4 at a time.
The formula for nCr is:

In the given case, n=10 and r=4. Using these values we get:

This means we can make 210 combinations of 10 objects taken 4 at a time.
There are 16 cups in a gallon. 6 pints in a quart. 4 quarts in a gallon.
Answer:

Step-by-step explanation:
Given

Required
Solve for x = -5
This implies that we substitute -5 for x in 

Open all brackets


Absolute value of 36 is 36; Wo, we have:



Answer:
450 foe
Step-by-step explanation: