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natulia [17]
3 years ago
10

Given f(x)=x^2 7 and g(x)=x-4/x. find (g o f)(-1). hint: (g o f)(-1)=g(f(-1))

Mathematics
1 answer:
lianna [129]3 years ago
4 0
I hope this helps you


x= -1 f (-1)=(-1)^2+7=1+7=8



g (f (-1))= g (8)


x=8 g (8)= 8-4/8=4/8=1/2
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Step-by-step explanation:

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The case where Xerxes arrives first and Regina arrives last is:

We have 10 slots, each slot corresponds to who arrived in which time.

For the first slot we have only one option, this is Xeres.

For the next slot we have 8 options (because Xeres already arrived, and Regina must arrive at last)

For the next slot we have 7 options.

for the next one we have 6 options, and so on.

So the combinations are:

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Now, the total number of combinations is:

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