anonymous
  • anonymous
Help me! I will medal and fan, only one question!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
Evaluate the following expression using the values given: Find 5x − 3y − z if x = −2, y = 2, and z = −3 −19 19 13 −13
anonymous
  • anonymous
I know that first, I would fill in the blanks.
anonymous
  • anonymous
5x-2-3x2- (-3)

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MichaelAlex292
  • MichaelAlex292
Do you need me to explain it, or to just give you an answer?
anonymous
  • anonymous
I do not want an answer, I just want someone to kind-of watch my work, so that I know I am solving it the right way. Asking for the answer would be against openstudy policies...
MichaelAlex292
  • MichaelAlex292
Like integer rules?
anonymous
  • anonymous
first, I would solve the multiplication, so 5x-2=-10, and 3x2=6, so -10-6-(-3), right?
MichaelAlex292
  • MichaelAlex292
Yes that's correct!
anonymous
  • anonymous
okay.. next, it would become -16- (-3), right, since we subtract 6 from -10?
MichaelAlex292
  • MichaelAlex292
Yep :)
anonymous
  • anonymous
then it would become -19??
anonymous
  • anonymous
@MichaelAlex292
MichaelAlex292
  • MichaelAlex292
Not quite... use your integer rules
anonymous
  • anonymous
-13?
MichaelAlex292
  • MichaelAlex292
Yes, now do you why?
anonymous
  • anonymous
not really, both are negative, and we are not multiplying?
MichaelAlex292
  • MichaelAlex292
Take this as an example:
MichaelAlex292
  • MichaelAlex292
6 - (-3) When there are 2 minus signs, you add 6 + 3
MichaelAlex292
  • MichaelAlex292
Now look at the one we were working on above
MichaelAlex292
  • MichaelAlex292
-16 - (-3) = -16 + 3 = -13
anonymous
  • anonymous
oh they cancel eachother out?
MichaelAlex292
  • MichaelAlex292
See it now?
MichaelAlex292
  • MichaelAlex292
Yea, the 2 minus signs form a plus
anonymous
  • anonymous
yes
MichaelAlex292
  • MichaelAlex292
Great!
anonymous
  • anonymous
can u help with one more? Again, I dont want an answer, I want help
MichaelAlex292
  • MichaelAlex292
Ok
anonymous
  • anonymous
Evaluate the following: −3 − (−2). −5 −1<< I followed same rule as last time... 1 −6
MichaelAlex292
  • MichaelAlex292
Wow, great job:\[-3 - (-2) = -3 + 2 = -1\] You are correct!
anonymous
  • anonymous
ok, thanks!
MichaelAlex292
  • MichaelAlex292
No problem

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