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Algebra / Linear functions Difficulty: Easy

The function f is defined by fx=-3x+60. What is the value of fx when x=-8?

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Explanation

Choice D is correct. The value of fx when x = - 8 can be found by substituting - 8 for x in the given function. This yields f-8=-3-8+60, or f-8=84. Therefore, when x = - 8 , the value of fx is 84 .

Choice A is incorrect. This is the value of -3+-8+60, not -3-8+60.

Choice B is incorrect. This is the value of -8+60, not -3-8+60.

Choice C is incorrect. This is the value of -3+60, not -3-8+60.