Standard Math Q+A Thread

[aimbotted]

Could someone please help me with this question?
I can never get how to read these tables, or what they actually mean.

yasssss i can

1880 x 12 x 30 = 676800

however when he pays 80000 the graph decreases by 8 years

therefor 1880 x 12 x 22 = 496320

676800-496320 = 180480 in savings

however he paid a lump sum of 80000 so 180480-80000 = 100480

[cjrig]

Could someone please help me with this question?
I can never get how to read these tables, or what they actually mean.

The drop in the graph is when he paid the lump sum, and we can see that he finishes paying the loan at 22 years when he pays the lump sum.

He paid the loan 8 years earlier. So we need to figure out how much he would have paid if he didn't pay the lump sum 8 years earlier:

8 x 12 x 1880 = 180,480

Now we minus the lump sum from $180,840 to see how much he saved:

180,480 - 80,000 = $100,480

So he saved $100,480

[pughg16]

yasssss i can

1880 x 12 x 30 = 676800

however when he pays 80000 the graph decreases by 8 years

therefor 1880 x 12 x 22 = 496320

676800-496320 = 180480 in savings

however he paid a lump sum of 80000 so 180480-80000 = 100480

Thankyou aimbotted!!

The drop in the graph is when he paid the lump sum, and we can see that he finishes paying the loan at 22 years when he pays the lump sum.

He paid the loan 8 years earlier. So we need to figure out how much he would have paid if he didn't pay the lump sum 8 years earlier:

8 x 12 x 1880 = 180,480

Now we minus the lump sum from $180,840 to see how much he saved:

180,480 - 80,000 = $100,480

So he saved $100,480

And thankyou Cjrig!!
I now get how to do these...after much brain searching!
Thanks!

[jamonwindeyer]

Good luck to everyone sitting their exam today!

[augustiscold]

That exam was fucking disgusting TBH.

[RuiAce]

That exam was fucking disgusting TBH.

We will open an exam discussion thread later. You can rant there

[aimbotted]

fucked me over so hard, this dumb cunt doesnt know how to do the 1st multiple choice question

[augustiscold]

fucked me over so hard, this dumb cunt doesnt know how to do the 1st multiple choice question

son don't even get me started..

[pughg16]

We will open an exam discussion thread later. You can rant there

DID ANYONE GET THE LAST QUESTION???
Excuse capitals, but I spent probably about half an hour on it...my feeble brain just couldn't get it.....
Anyone have the same problem??
I didn't mind the rest of t...but still...

[aimbotted]

DID ANYONE GET THE LAST QUESTION???
Excuse capitals, but I spent probably about half an hour on it...my feeble brain just couldn't get it.....
Anyone have the same problem??
I didn't mind the rest of t...but still...

yep mean was 64 and sd was 10

[jamonwindeyer]

General Math Discussion Board is now up and running!

[pughg16]

yep mean was 64 and sd was 10

Sorry, can you explain how you got that??
It totally confused me!!

[aimbotted]

(i) mean = 88 - (s x 2.4)
mean = 88 - 2.4s

(ii) mean = 52 - (s x -1.2)
mean = 52 + 1.2s

mean = 88 - 2.4s
mean = 52 + 1.2s

88 - 2.4s = 52 + 1.2s

-2.4s - 1.2s = -3.6s

52-88 = -36

-3.6 s = -36

s = 10

thus standard deviation is 10

88 - (10x2.4)

= 64

52 - (10 x -1.2)

= 64

thus mean is 64

[pughg16]

(i) mean = 88 - (s x 2.4)
mean = 88 - 2.4s

(ii) mean = 52 - (s x -1.2)
mean = 52 + 1.2s

mean = 88 - 2.4s
mean = 52 + 1.2s

88 - 2.4s = 52 + 1.2s

-2.4s - 1.2s = -3.6s

52-88 = -36

-3.6 s = -36

s = 10

thus standard deviation is 10

88 - (10x2.4)

= 64

52 - (10 x -1.2)

= 64

thus mean is 64

Thanks!! U made it look so simple....and I just realised how to do it...I HATE exam nerves!!!
Thanks again!

[aimbotted]

Thanks!! U made it look so simple....and I just realised how to do it...I HATE exam nerves!!!
Thanks again!

that question was hard
i wasted 30 minutes and panic kicked in until i realized i was just missing a -