# How do you evaluate #z^4-w# if # w=6, x=0.4, y=1/2, z=-3#?

Finding the value of an algebraic expression given numerical values for the variables is known as "evaluating" the expression.

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z^4 - w = (-3)^4 - 6 = 81 - 6 = 75.

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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.

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.

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.

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