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How do you evaluate #6-3(2x+4)# when x=5?

Answer 1

Eva Abramson

Answer: -36

Evaluate #6-3(2x+4)# when #x=5# . . . . . . . . . . . .

Replacing:

#6-3(2(5)+4)#

#6-3(10+4)#

#6-3(14)#

#6-42#

= #-36#

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Answer 2

Avery Alexander

To evaluate ( 6 - 3(2x + 4) ) when ( x = 5 ), follow these steps:

Substitute ( x = 5 ) into the expression.
Perform the operations according to the order of operations (PEMDAS/BODMAS), which is Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).

[ 6 - 3(2(5) + 4) ] [ = 6 - 3(10 + 4) ] [ = 6 - 3(14) ] [ = 6 - 42 ] [ = -36 ]

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.