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UkoKoshka [18]
3 years ago
11

C. What is f (-5)? When the function is f(x) =-3x+7

Mathematics
1 answer:
bazaltina [42]3 years ago
5 0

Answer:

f(-5) = 22

Step-by-step explanation:

f(x) =-3x+7

Let x = -5

f(-5) =-3*-5+7

      = 15 +7

       =22

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Answer:

<h2>f( - 9) = 187</h2>

Step-by-step explanation:

f(x) =  {2x}^{2}  - 5x - 20

To find f(-9) , substitute the value of x that's -9 into f(x). That is for every x in f (x) replace it with - 9

We have

<h3>f( - 9)  = 2 ({ - 9})^{2}  - 5( - 9) - 20 \\  = 2(81) + 45 - 20 \\  = 162 + 25 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:</h3>

We have the final answer as

<h3>f( - 9) = 187</h3>

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