Question

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<<<<<<<<<<<

Answer 1

@UsukiDoll

Answer 2

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

Answer 3

\[\frac{-27a^4b^3}{3ab} \rightarrow = -9a^3b^2\]

Answer 4

exponent laws \[\frac{a^4}{a} \rightarrow a^{4-1} \rightarrow a^3 \] same applies to b

Answer 5

Thats for the second question right?

Answer 6

yeah... imo both of your answers are way off

Answer 7

Oh..

Answer 8

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

Answer 9

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

Answer 10

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

Answer 11

isnt it odd?

Answer 12

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

Answer 13

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

Answer 14

a different answer?

Answer 15

Yes I get an even but the choices are all odd

Answer 16

it's probably because they haven't realized that they can fine tune it .

Answer 17

but converse statements are usually positive ... it's the original if A then B statement written in reverse.

Answer 18

So C should be the reverse from the original A then B

Answer 19

Am I correct? or still way off?

Answer 20

worse.......and on top of that I gave out the definitions earlier

Answer 21

look at what I wrote earlier.

Answer 22

So if 2x+1 is odd, then x is odd right?

Answer 23

yes

Answer 24

So if I got that then the answer is A

Answer 25

yes

Answer 26

YES!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 27

Can you help with the first question?

Answer 28

of?

Answer 29

Sorry I meant the second question

Answer 30

it's straight forward..... you need to understand the exponent laws for a and b we know that \[\frac{-27}{3} = -9\]

Answer 31

if a and b are just single then it's technically \[a^1\] and \[b^1\] but no one writes it like that anymore

Answer 32

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

Answer 33

Oh really? how come?

Answer 34

they claim that you grew up from high school so now it's time to write it in college style notation

Answer 35

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

Answer 36

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

Answer 37

and stop writing a^1

Answer 38

that's how the professors work now.

Answer 39

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

Answer 40

you can't have double signs... can't have +-, -- , -+,++ . just one is allowed either - or +

Answer 41

I don't know why teachers write stuff like that...it's irritating

Answer 42

That's how I've had it for a few tests

Answer 43

It is reasons why I come to open study xD

Answer 44

what grade are you in?

Answer 45

I'm a freshman

Answer 46

oh 9th grade?

Answer 47

Yeah

Answer 48

where did you get that first question? It belongs in logic and discrete math. something in the 300 level at my university

Answer 49

unless you're at a private school?

Answer 50

No I'm home schooled

Answer 51

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 .

Answer 52

*everything

Answer 53

Lmao if you dont like it then why major in it?

Answer 54

If I didn't go further in my Math Studies, I wouldn't have been able to help you.

Answer 55

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(