Question 9888: For which of the following expressions would the value be greater if 160 were replaced by 120. (There may be more than one correct answer.)
1) 1,000-160
2) (160)/(1+160)
3) (1)/(1-(1/160))
Answer by torielan(2)   (Show Source):
You can put this solution on YOUR website!
first answer all the ?s the why they are..
1) 1,000-160
I like to do it vertical
1000
- 160
_____________
840
to check think does 840+160=1000
yes it does so thats right
2) (160)/(1+160)
160 160
________ = _____
(1+160) 161
that cant be reduced so that is yor answer
now..u try to do the last one by yourself
then you have to find out if the value would be greater with 160 or 120 so you replace all the 160s for 120s
1.) 1,000-120
2.) (120)/(1+120)
you do the 3rd
now work those problems
1,000
- 120
_______
880
again cheak by adding 880 and 120... and it does = 1000
so its right
next...
(120)/(1+120)
120 120
_____ = _____
1+120 121
and that will not reduce so thats your answer
yes do # 3 now..
now you take both the values and see what one is bigger
on number 1 840 and 880
the 2nd 1 is bigger so the 1st one's value is greater with 120 instead of 160
on number 2 160 120
_____ and _______
161 121
on this one to find out which one is bigger you need a common denominator. Lets use...one i know will work
161 x 121 = 19481
19360 19320
_______________ and ________________
19481 19481
so now you see that 160
_____
161 is greater
does that answer your question
good luck on # 3
|
|
|
