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Evaluate the following expression using the values given.
Find 4x - y - 2z if x = -2, y = 3, and z = -2

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what are you having trouble with?

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you substitute the values given for the appropriate variable then follow PEMDAS

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Substitute what values?

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x = -2, y = 3, and z = -2

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the numbers are values

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Ohh okay 1 sec

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is it 9?

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no, first just sub the values and rewrite the full expression with the x y z

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i mean without the x y z

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you can rewrite it here

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do u understand what im asking?

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4(-2) - 3 - 2(-2)

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exactly! now do you know how to solve that?

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I do the ones in parentheses first right?

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well parentheses come first, but here what is inside the parentheses is just a number, there nothing to do in there. so you actually do multiplication first. 4(-2) is just another way, a more clear way, of saying 4 * -2

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I did that and I got 8 - 3 - -4

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4 * -2 actually equals -8

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Ohhhhh whoops

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whenever you multiply a negative and a positive the answer is always negative

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Oh so it';s -7?

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boom! nice job

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Haha, thanks!

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:) good luck