anonymous
  • anonymous
Evaluate the following expression using the values given. Find 4x - y - 2z if x = -2, y = 3, and z = -2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
what are you having trouble with?
anonymous
  • anonymous
you substitute the values given for the appropriate variable then follow PEMDAS
anonymous
  • anonymous
Substitute what values?

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anonymous
  • anonymous
x = -2, y = 3, and z = -2
anonymous
  • anonymous
the numbers are values
anonymous
  • anonymous
Ohh okay 1 sec
anonymous
  • anonymous
is it 9?
anonymous
  • anonymous
no, first just sub the values and rewrite the full expression with the x y z
anonymous
  • anonymous
i mean without the x y z
anonymous
  • anonymous
you can rewrite it here
anonymous
  • anonymous
do u understand what im asking?
anonymous
  • anonymous
4(-2) - 3 - 2(-2)
anonymous
  • anonymous
exactly! now do you know how to solve that?
anonymous
  • anonymous
I do the ones in parentheses first right?
anonymous
  • anonymous
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
anonymous
  • anonymous
I did that and I got 8 - 3 - -4
anonymous
  • anonymous
4 * -2 actually equals -8
anonymous
  • anonymous
Ohhhhh whoops
anonymous
  • anonymous
whenever you multiply a negative and a positive the answer is always negative
anonymous
  • anonymous
Oh so it';s -7?
anonymous
  • anonymous
boom! nice job
anonymous
  • anonymous
Haha, thanks!
anonymous
  • anonymous
:) good luck

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