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Given the function f(x) = 8(4 - x), what is the value of f(-5)?

A) f(-5) = -24
B) f(-5) = 40
C) f(-5) = 0
D) f(-5) = -8

2 Answers

4 votes

Answer:

f(-5) = 8(4 - (-5)) = 8(9) = 72

User Jamby
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4 votes

Final answer:

To calculate f(-5) for the function f(x) = 8(4 - x), you substitute -5 for x which gives 8(4 + 5) = 8 * 9 = 72. However, this result does not match any of the provided options, indicating a possible error in the question.

Step-by-step explanation:

To find the value of f(-5) for the function f(x) = 8(4 - x), you need to substitute -5 in place of x. Therefore:

f(-5) = 8(4 - (-5))

Next, you simplify the equation inside the parentheses by changing the minus to a plus since subtracting a negative number is equivalent to adding its positive counterpart.

f(-5) = 8(4 + 5) = 8(9)

Finally, you multiply 8 by 9.

f(-5) = 8 * 9 = 72

However, none of the options given from A to D match the correct answer, 72. This suggests there might be an error in the options provided or in the calculation.

User Sam Saarian
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