Choosing "r" things from a set of "n" can be done in this many ways:
combinations = n! / [r! * (n-r)!]
combinations = 7! / [3! * 4!]
combinations = 7 * 6 * 5 / 6
combinations = 35
Source:http://www.1728.org/combinat.htm
Answer:
234234984
Step-by-step explanation:
C^2 - d^2 / d^2 + cd - 2c^2
= cd + c^2 - 2c^2 - d^2 / d^2
= cd - c^2 - 1 (answer)
(<u>100 m / 10.4 sec</u>) x (3600 sec/hr) x (mile/1609.344m) = <em>21.5</em> miles per hour
Rounded to the nearest whole number, that's<em> 22 mph</em> .
