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avatar+2448 

Please help ty and also please explain each one!

 Apr 17, 2018
 #1
avatar+98198 
+2

First one  - None are equal to x^7

A  = x^(7/2)

B = x^(-5)

C =x^(2/7)

D  = X^(-5)

 

Second one - Range = what y values are covered by the relation ??...these are  B = {-5, -3, 2, 4 }

 

Third one  - (2x - 1) (3x + 1)  = 2x(3x + 1)  - 1(3x + 1)  =  6x^2 + 2x  -3x - 1   =  6x^2 - x - 1

 

Fourth one  - let's rearrange  "C"

5x  =  y  - 8      add 8 to both sides

5x + 8  =  0

Note that when x  = 0, y  = 8

This must be the correct one since the point   (0,8)  is in the table

 

 

Fifth one  -   4 + x

                   _____     

                      12

The only thing that would make this undefined is if the denominator could be made to  = 0...however...nothing makes the denominator   = 0.....so we can put any real number into the function for x .....so..... "A"

 

 

Last one - this isn't srtictly linear.....my best guess ??   B = 89...reason....the function always increases by  more than 1 from  year-to-year but never by as much as 10

 

cool cool cool

 

 

 

cool cool cool

 Apr 17, 2018
edited by CPhill  Apr 17, 2018
edited by CPhill  Apr 17, 2018
 #2
avatar+2448 
+1

Tysm but for the first question the answer would be C but the thing is...idk how..

RainbowPanda  Apr 17, 2018
 #3
avatar+98198 
+1

Mmmm....don't see how they get that....here is  Wolframalpha's answer :  http://www.wolframalpha.com/input/?i=(x%5E2)+%5E(1%2F7)

 

It seems to match mine......

 

 

cool cool cool

CPhill  Apr 17, 2018
 #4
avatar+2448 
+1

Odd...Ty :)

RainbowPanda  Apr 17, 2018

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