+0  
 
0
111
4
avatar+1164 

Please help ty and also please explain each one!

RainbowPanda  Apr 17, 2018
 #1
avatar+87334 
+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

CPhill  Apr 17, 2018
edited by CPhill  Apr 17, 2018
edited by CPhill  Apr 17, 2018
 #2
avatar+1164 
+1

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

RainbowPanda  Apr 17, 2018
 #3
avatar+87334 
+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+1164 
+1

Odd...Ty :)

RainbowPanda  Apr 17, 2018

6 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.