anonymous
  • anonymous
CAN SOMEONE CHECK MY ANSWERS PLEASE???? 1.Which is the converse of the statement? If x is odd, then 2x + 1 is odd. If 2x + 1 is odd, then x is odd. If 2x + 1 is not odd, then x is not odd.<<<< If x is odd, then 2x + 1 is odd. If x is not odd, then 2x + 1 is not odd. 2.Simplify. -27a^4b^3/3ab –9a2b –9a3b2 –3ab -a^2/9b<<<<<<<<<<<
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
UsukiDoll
  • UsukiDoll
ok so the negation of the first statement is If x is NOT odd, then 2x + 1 is NOT odd. converse is flipping the statement If 2x+1 is odd, then x is odd contrapositive is the negative version of that converse statement if 2x+1 is NOT odd, then x is NOT odd
UsukiDoll
  • UsukiDoll
\[\frac{-27a^4b^3}{3ab} \rightarrow = -9a^3b^2\]

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UsukiDoll
  • UsukiDoll
exponent laws \[\frac{a^4}{a} \rightarrow a^{4-1} \rightarrow a^3 \] same applies to b
anonymous
  • anonymous
Thats for the second question right?
UsukiDoll
  • UsukiDoll
yeah... imo both of your answers are way off
anonymous
  • anonymous
Oh..
UsukiDoll
  • UsukiDoll
Original statement If A then B Negation If NOT A then NOT B conversely if B then A contrapositive if NOT B then NOT A
UsukiDoll
  • UsukiDoll
Original statement A = x is odd B = 2x+1 is odd If A then B if x is odd then 2x+1 is odd Negation If NOT A then NOT B if x is NOT odd then 2x+1 is NOT odd conversely if B then A If 2x+1 is odd then x is odd contrapositive if NOT B then NOT A if 2x+1 is NOT odd then x is NOT odd
UsukiDoll
  • UsukiDoll
these guys fail to mention that you can fine tune the negative versions of the statement If NOT A then NOT B if x is NOT odd then 2x+1 is NOT odd if x is even then 2x+1 is even
anonymous
  • anonymous
isnt it odd?
UsukiDoll
  • UsukiDoll
I said you can refine the negative versions of the statement Negation If NOT A then NOT B if x is NOT odd then 2x+1 is NOT odd if it's not odd, then it's even.. but that can be easily disproved because 2k is even and 2k+1 is odd
anonymous
  • anonymous
Alright..I understood what you told me and when I used it in the equation I get a different answer than they give in the options
UsukiDoll
  • UsukiDoll
a different answer?
anonymous
  • anonymous
Yes I get an even but the choices are all odd
UsukiDoll
  • UsukiDoll
it's probably because they haven't realized that they can fine tune it .
UsukiDoll
  • UsukiDoll
but converse statements are usually positive ... it's the original if A then B statement written in reverse.
anonymous
  • anonymous
So C should be the reverse from the original A then B
anonymous
  • anonymous
Am I correct? or still way off?
UsukiDoll
  • UsukiDoll
worse.......and on top of that I gave out the definitions earlier
UsukiDoll
  • UsukiDoll
look at what I wrote earlier.
anonymous
  • anonymous
So if 2x+1 is odd, then x is odd right?
UsukiDoll
  • UsukiDoll
yes
anonymous
  • anonymous
So if I got that then the answer is A
UsukiDoll
  • UsukiDoll
yes
anonymous
  • anonymous
YES!!!!!!!!!!!!!!!!!!!!!!!!!!!
anonymous
  • anonymous
Can you help with the first question?
UsukiDoll
  • UsukiDoll
of?
anonymous
  • anonymous
Sorry I meant the second question
UsukiDoll
  • UsukiDoll
it's straight forward..... you need to understand the exponent laws for a and b we know that \[\frac{-27}{3} = -9\]
UsukiDoll
  • UsukiDoll
if a and b are just single then it's technically \[a^1\] and \[b^1\] but no one writes it like that anymore
UsukiDoll
  • UsukiDoll
the same goes for -1c... professors will mark points off not because it's wrong.. because the notation is childish... so the correct way to express your answer is -c
anonymous
  • anonymous
Oh really? how come?
UsukiDoll
  • UsukiDoll
they claim that you grew up from high school so now it's time to write it in college style notation
UsukiDoll
  • UsukiDoll
the same goes for simple stuff like this 7+(-7) you can't have a double sign it's 7-7 =0 again for 7-(-7). distribute that negative it's now 7+7 = 14
UsukiDoll
  • UsukiDoll
when I reached Algebra 2, I had to knock it off with writing -1c and just write -c for the simple problems, it's Algebra 1 that you need to stop writing double signs
UsukiDoll
  • UsukiDoll
and stop writing a^1
UsukiDoll
  • UsukiDoll
that's how the professors work now.
anonymous
  • anonymous
You dont know how many questions I got wrong b/c this -3-3 is actually -3+3 or 5-5-4 is actually 5+ -5 + -4
UsukiDoll
  • UsukiDoll
you can't have double signs... can't have +-, -- , -+,++ . just one is allowed either - or +
UsukiDoll
  • UsukiDoll
I don't know why teachers write stuff like that...it's irritating
anonymous
  • anonymous
That's how I've had it for a few tests
anonymous
  • anonymous
It is reasons why I come to open study xD
UsukiDoll
  • UsukiDoll
what grade are you in?
anonymous
  • anonymous
I'm a freshman
UsukiDoll
  • UsukiDoll
oh 9th grade?
anonymous
  • anonymous
Yeah
UsukiDoll
  • UsukiDoll
where did you get that first question? It belongs in logic and discrete math. something in the 300 level at my university
UsukiDoll
  • UsukiDoll
unless you're at a private school?
anonymous
  • anonymous
No I'm home schooled
UsukiDoll
  • UsukiDoll
oh O_O... in a way that's great because public schools went nuts... you don't want to learn common core..trust me. I'm a Math Major and I hate everyday common core did to Math .
UsukiDoll
  • UsukiDoll
*everything
anonymous
  • anonymous
Lmao if you dont like it then why major in it?
UsukiDoll
  • UsukiDoll
If I didn't go further in my Math Studies, I wouldn't have been able to help you.
UsukiDoll
  • UsukiDoll
xD. I said Common Core Math was awful....the stuff that makes simple subtraction crazy. my cousins, second grade and kindergarten, are stuck with it. Public and private schools have it. x(

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