Question

If 2 < 20x - 13 <3, what is one possible value for x?

Answer 1

Answer I get after solving 0.75 < x < 0.8 , so I need to know the one posible value for x now?

Answer 2

2+13<20x<3+13
15<20x<16
15\20<x<16\20
3\4<x<4\5

Answer 3

Yes, so now I need to know the one posible value for x now?

Answer 4

(P.s. Oh yes I knew how to work it out, I just dont get what os the one possible value for x?)

Answer 5

You can pick any number that lies between 3/4 and 4/5. So why not the midpoint


(3/4+4/5)/2 = (15/20 + 16/20)/2 = (31/20)/2 = 31/40


This means that the number 31/40 is the midpoint between 3/4 and 4/5


So one possible value for x is x = 31/40

Answer 6

The answer at the back of he book is 76 for this question. I think something is wrong.

Answer 7

Either in the question, or the answer.

Answer 8

Well 76 is clearly outside the bounds, so yes that's my guess too.

Answer 9

My guess is the book says .76,
either you misread the decimal point or the book has typo :)

Answer 10

Okay, even if I take 0.76 as the value for x? I would ask WHY?

Answer 11

Why 0.76?

Answer 12

Because 0.76 is larger than 0.75 and smaller than 0.8


So 0.75 < 0.76 < 0.8

Answer 13

And 0.76 = 0.75 + 0.01, so that may be why the book chose this number

Answer 14

Obviously .76 belongs to the range [ .75, .8 ]

Answer 15

okay thanks.