+0

0
331
4
+2448

Apr 17, 2018

#1
+101952
+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

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

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

RainbowPanda  Apr 17, 2018
#3
+101952
+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......

CPhill  Apr 17, 2018
#4
+2448
+1

Odd...Ty :)

RainbowPanda  Apr 17, 2018