In one year three awards (research, teaching, and service) will be given to a class of 25 graduate students in a specific department. If each student can receive at most one award, how many possible selections are there?

Step-by-step explanation:

25C3 × 3! = 13800

Alternately,

25×24×23 = 13800

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13

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step-by-step explanation: