Save Me From Failure

misheeru · 2010-03-01 09:36:16

Hi guys

I have my big final test comming up in geometry, its the most impotant test of the chapter and if i don't get a C or higher my Struggling grade will crumble to a C- or even a D!!!!

I managed to find out what the test was going to cover, AND REALIZED THAT I WASNT GOING TO GET ANY OF IT.

I'm kinda in a panic and I have about two days to figure all this out.

I went back into all the previous chapters to get problems that are similar to the ones I might be coming across in the actual test, I will post problems from the Chapters here and any help is appreciated.

My hope is, to post few problems from each chapter and get the answers for them, that way I can get a general idea of what to do and answer a few in the exercises.

Its really important I get better at doing this stuff and pass this test! So please help me!

misheeru · 2010-03-01 09:46:53

Ok my first one is ratios:

I think I get the basic stuff like if it say here to "find the Ratio in simplest form"
and they give me: Fifteen minutes to Two hours" then the answer is just 15/2, right?

That was a guess
However I have no clue with this other stuff so here it is:

Find the Ratio in simplest form:

2/3 to 3/2

Next is this:

Find the ratio of X to Y

X/3 = 5/8 = 5/Y

and

Solve for X

3:12 = X:16

and

X/5 = 2/3

P.S. these exersises are multiple choice so if anyone wants the choices i can post those too, unless you prefer it this way

Last edited by misheeru (2010-03-01 09:50:11)

bobbym · 2010-03-01 10:52:16

Hi misheeru;

Don't Panic!

I think I get the basic stuff like if it say here to "find the Ratio in simplest form"
and they give me: Fifteen minutes to Two hours" then the answer is just 15/2, right?

Let's start here. Fifteen minutes to 2 hours is not 15 / 2. The units are different. To compare physical things they have to be in the same units. the answer is 15 mins / 120 mins which is 1 / 8. Do you understand this?

misheeru · 2010-03-01 10:56:57

bobbym wrote:

Hi misheeru;
Don't Panic!
I think I get the basic stuff like if it say here to "find the Ratio in simplest form"
and they give me: Fifteen minutes to Two hours" then the answer is just 15/2, right?
Let's start here. Fifteen minutes to 2 hours is not 15 / 2. The units are different. To compare physical things they have to be in the same units. the answer is 15 mins / 120 mins which is 1 / 8. Do you understand this?

By units you mean the hours and the minute right?
So then if is had just been 15 to 2 would it be the same?

bobbym · 2010-03-01 11:07:15

Nope.

15 / 2 is 7.5 which is a lot different than 1 / 8 which is .125

misheeru · 2010-03-01 11:15:54

hmmm ok so for example if it was 30 to 6 would the answer be 5/1?

But if it was 30 minute to 6 hours it would be something like 30 mins to 360 mins or 1/12... or something like that?

bobbym · 2010-03-01 11:17:35

That's right. You wouldn't exchange pennies for dollars, would you? What is 125 pennies to 8 dollars?

misheeru · 2010-03-01 11:23:12

omg i got something right???

all my joy of getting something right was robbed from me because i now need help on the pennies to dollars thing...

do you start with just 125/8?

bobbym · 2010-03-01 11:28:34

Remember change to the same units with physical things that are in units. You can't compare inches to feet.

misheeru · 2010-03-01 11:32:15

ok so theres 100 pennies in each dollar

so i would cange to.... 125 pennies to 800 pennies? But then i think it goes to 6.4... that isn't write is it?

bobbym · 2010-03-01 11:38:18

misheeru · 2010-03-01 11:43:44

bobbym wrote:

i need to change my background.... its dark gray so when stuff is written this way it it hard to see..

that is 125/800 = 5/32, right?

bobbym · 2010-03-01 11:48:04

That's correct. I use sleek blue or oxygen for my display.

misheeru · 2010-03-01 11:51:46

mine is the black and green one idk wut its called... i wonder if they have something in purple....

ok so if the units are different you need to change it got it

so wut about the other ones i have up here?
the

Find the ratio of X to Y

X/3 = 5/8 = 5/Y?

Last edited by misheeru (2010-03-01 11:52:02)

bobbym · 2010-03-01 11:59:05

This is the next one:

Multiply the top and bottom by 6:

misheeru · 2010-03-01 12:07:09

k.. wait b4 we go any further i wanted to say

thank you and im sorry

This must be annoying because its probably so easy for you and hard for me..

bobbym · 2010-03-01 12:11:48

Not true. I am never annoyed at a question. I learn a lot from answering a question.

Next one:

Find the ratio of X to Y

X/3 = 5/8 = 5/Y the answer is Y = 8.

misheeru · 2010-03-01 12:14:51

ok thats good ialways felt bad because when i would do tutoring , i felt like i was annoying my teachers..
like there mouth says"oh its good yourtrying to get help" but there eyes say"jeez this girl is dense, when is it gonna B 5:30?"

Last edited by misheeru (2010-03-01 12:15:08)

misheeru · 2010-03-01 12:25:33

anyway...
so ur last one do we do something similar with this

3:12 = X:16? If we are solving for X?

bobbym · 2010-03-01 12:38:44

You solve these by cross multiplying.

x = 4

misheeru · 2010-03-01 12:54:46

ok so for exapmle if it was say X/2 = 6/2

then it would be like X * 2 = 2 * 6?

Which then, assuming I have the 1st part right goes to 2 * 6 = 2X? which goes to 12 = 2X? Then X = 6?

bobbym · 2010-03-01 12:55:45

Correct!

misheeru · 2010-03-01 13:03:56

oh-em-gee!

I got 2 right in the same day?!

misheeru · 2010-03-01 13:11:07

ok so what about this one:

Find the Ratio in simplest form:

2/3 to 3/2

bobbym · 2010-03-01 13:19:14

I believe I already did that one: see post #15.

Math Is Fun Forum

#1 2010-03-01 09:36:16

Save Me From Failure

#2 2010-03-01 09:46:53

Re: Save Me From Failure

#3 2010-03-01 10:52:16

Re: Save Me From Failure

#4 2010-03-01 10:56:57

Re: Save Me From Failure

#5 2010-03-01 11:07:15

Re: Save Me From Failure

#6 2010-03-01 11:15:54

Re: Save Me From Failure

#7 2010-03-01 11:17:35

Re: Save Me From Failure

#8 2010-03-01 11:23:12

Re: Save Me From Failure

#9 2010-03-01 11:28:34

Re: Save Me From Failure

#10 2010-03-01 11:32:15

Re: Save Me From Failure

#11 2010-03-01 11:38:18

Re: Save Me From Failure

#12 2010-03-01 11:43:44

Re: Save Me From Failure

#13 2010-03-01 11:48:04

Re: Save Me From Failure

#14 2010-03-01 11:51:46

Re: Save Me From Failure

#15 2010-03-01 11:59:05

Re: Save Me From Failure

#16 2010-03-01 12:07:09

Re: Save Me From Failure

#17 2010-03-01 12:11:48

Re: Save Me From Failure

#18 2010-03-01 12:14:51

Re: Save Me From Failure

#19 2010-03-01 12:25:33

Re: Save Me From Failure

#20 2010-03-01 12:38:44

Re: Save Me From Failure

#21 2010-03-01 12:54:46

Re: Save Me From Failure

#22 2010-03-01 12:55:45

Re: Save Me From Failure

#23 2010-03-01 13:03:56

Re: Save Me From Failure

#24 2010-03-01 13:11:07

Re: Save Me From Failure

#25 2010-03-01 13:19:14

Re: Save Me From Failure

Board footer