#1
the ones im stuck at is 19,20,23 27-31 34-39

please help me out is due on monday and at the pace im going i never finish
and i dont understand some of the stuff

so it be awesome if you could post an explanation or help me out with a problem

any help is appreciated

edit: 12 is down yay
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test.txt
my guitar stuff:
ESP JH-600
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Taylor 314CE
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Cordoba C7 Nylon String Acoustic Guitar
Metal muff
Fender American Deluxe Stratocaster Ash
Last edited by stefan1988 at Mar 9, 2008,
#2
well you see... the square root of X is 58 and then you add the ole E = MC2 and get well... you get a big Russian man at your front door telling you to go join the navy but ignore him...
#3
lol the ones im suck on are.... its like the whole thing.

do your own work and tell your teacher you struggled, you will benifit from it
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#4
pfft don't expect us to do the majority of your homework for you.

34. A rectangular garden has length L two feet longer than twice its width W. Find the width of the garden if the area of the garden is 144 square meters (m2). A = LW. Solve for width, W.

a. 8 meters b. 10 meters c. 12 meters d. 15 meters e. 16 meters


This question is stupid, why is it using feet and meters? I'm just gonna assume that "feet" is an error and read it as meters. So;

L= 2W + 2

Area = L * W
= W(2W + 2)
= 2W² + 2W

So 2W² + 2W = 144
W² + W - 72 = 0

factorise to find W = 8 or -9
seeing as the width cannot be -9, the answer is 8m.
#5
that stuff is easy, do it yourself, youll learn more from it then
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#6
1 question. what grade are you in? & is problem number nine written correctly?
#8
Quote by Gaz_m2k5

This question is stupid, why is it using feet and meters?

It could also be possible it wants you to convert meters to feet, or vice versa.
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#9
You need to divide by zero.
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#10
emmm... why does your math teacher give you alternatives to the answers? It isn't exactly difficult. And btw, do it yourself.

And how old are you? i cant remember the last time I had to do the maths homeworks. But it must have been when I was 14/15...
#11
Quote by Gaz_m2k5
pfft don't expect us to do the majority of your homework for you.

34. A rectangular garden has length L two feet longer than twice its width W. Find the width of the garden if the area of the garden is 144 square meters (m2). A = LW. Solve for width, W.

a. 8 meters b. 10 meters c. 12 meters d. 15 meters e. 16 meters


This question is stupid, why is it using feet and meters? I'm just gonna assume that "feet" is an error and read it as meters. So;

L= 2W + 2

Area = L * W
= W(2W + 2)
= 2W² + 2W

So 2W² + 2W = 144
W² + W - 72 = 0

factorise to find W = 8 or -9
seeing as the width cannot be -9, the answer is 8m.


cause it makes you work a bit more, and also it helps to learn how to convert different units

my physics teacher does that all the time
#12
Quote by deluxity
cause it makes you work a bit more, and also it helps to learn how to convert different units

my physics teacher does that all the time


Yes but feet isn't an SI unit. Generally people have stopped teaching old units like feet. If the teacher wanted to catch you out they would use something like km, to make you convert that.

Either way, I got 8m. If you converted that 2 in the equation from 2feet to however many meters, you wouldn't get any of the proposed answers.
#13
Quote by Bubban
You need to divide by zero.

if he does that on paper...the paper may explode
#14
12.

9t^4 - 25t^2 + 16 = (t-1)(9t^3 +9t^2 -16t - 16)
= (t-1)(t+1)(9t^2 - 16)
= (t-1)(t+1)(3t + 4)(3t - 4) by using difference of squares to factor (9t^2 - 16)

The easy way to factor stuff is to throw numbers into the equation that divide into the first number or the last number and if it equation becomes 0 then (x- a) is a factor.

In this case, 1 goes into 9 or 16 so if you look at the equation and put 1 into it
9*(1)^4 - 25*(1)^2 + 16 = 0 so you can say (t - 1) is a factor

-1 also divides into both 9 or 16 so in this case once again
9*(-1)^4 - 25*(-1)^2 + 16 = 0 so you can say (t - (-1)) is a factor, or more simply (t + 1)
#15
20. Don't quote me since I don't know if this is the way to do it but I think I have the idea.

We need to find the three sides with x-2, x, x + 2 and use Pythagorean Theorem with x + 2 being the hypotuse.

Working backwards. 8 is the answer since:

8-2 = 6, x = 8, x + 2 = 10

So 6^2 + 8^2 = 10 ^2
36 + 64 = 100
100 = 100

8 is the answer.
#16
Quote by Gaz_m2k5
Yes but feet isn't an SI unit. Generally people have stopped teaching old units like feet. If the teacher wanted to catch you out they would use something like km, to make you convert that.

Either way, I got 8m. If you converted that 2 in the equation from 2feet to however many meters, you wouldn't get any of the proposed answers.

Not when you live in the United States and things are measured in feet and miles and such.
#17
I have enough homework myself to worry about yours.


Yet I'm here in your thread, still not doing them.
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#18
Quote by Gaz_m2k5
Yes but feet isn't an SI unit. Generally people have stopped teaching old units like feet. If the teacher wanted to catch you out they would use something like km, to make you convert that.

Either way, I got 8m. If you converted that 2 in the equation from 2feet to however many meters, you wouldn't get any of the proposed answers.



yeah, but that's boring

(yes, i'm a math geek)
#19
Quote by gibsonpenguin
Not when you live in the United States and things are measured in feet and miles and such.


But the yanks are backwards people.
#20
For number 19, wherever 2 lines intersect, the equations for the lines are equal. Therefore:

x^2 - x = 6
x^2 - x - 6 = 0

Then use whatever factorisation method you have to get:

(x + 2)(x - 3) = 0

Hence, either;

x + 2 = 0
in which case x = -2

Or;

x - 3 = 0
so x = 3

Put them into the equation again, and you have

f(-2) = (-2)^2 - (-2) = 6
f(3) = (3)^2 - (3) = 6

So the points of intersection are (-2, 6) and (3, 6)
#21
So the points of intersection are (-2, 6) and (3, 6)


im confused is that the answer it doesnt appear on the choices


plz keep the answers coming guys my life depends on this and i cant find nobody to help me out the explanations help me alot
my guitar stuff:
ESP JH-600
ValveKing 112
DigiTech Whammy Pedal
Taylor 314CE
Dunlop SW-95 Slash Wah Pedal
Cordoba C7 Nylon String Acoustic Guitar
Metal muff
Fender American Deluxe Stratocaster Ash