Mathematics - 26 September 2007

2007-09-26 09:00:07 · 18 answers · asked by lula4ever04 1

1)what is the least common denominator of 1/2, 2/7x, and 5/x?
(1)9x
(2)2x
(3)14x
(4)14x^2?

2)what is the sum of 2/x and x/2?

2007-09-26 08:59:06 · 1 answers · asked by timothy_yeav 5

a. soppose tha jet traavels 60 kilometers in 5 minutes. how many kilometers will it travel in 2 hours? In 6 hours?

b. how many more kilometers will the jet travel in 6 hours than in 2 hours?

c. soppuse that nodin flew on this jet to the dominician republic. If his trip took 4 hours, how many kilometers did he travel?


these are the probles i need help wid they are 3 dif. problems so plz help

2007-09-26 08:57:33 · 3 answers · asked by Anonymous

The worksheet is combining like terms. The problem is.

-2(c-d)+(c-d)-6(c-d)

Thank you so much for your help. I am so confused!

2007-09-26 08:54:13 · 10 answers · asked by wwefan1324 5

Ok this is the problem x^2-10X+18=0 .

As an answer i got 10(+)(-)2sqrt7 /2 = 5(+)(-)2sqrt7.

Is my answer correct. If not can someone help. THanks

2007-09-26 08:53:47 · 3 answers · asked by Anonymous

I know the difference between a constant value and a variable value. A constant takes a fixed value and doesn't change. A variable value may take multiple values. But I don't understand the difference between a variable and a parameter. I'm thinking that they are somehow related though...

2007-09-26 08:51:46 · 5 answers · asked by the redcuber 6

2007-09-26 08:46:47 · 3 answers · asked by antm071993 1

how would I solve:

(2x^2)+x=30

I got this far, is it right?

x(2x+1)-30=0

How would I solve it?

2007-09-26 08:45:52 · 7 answers · asked by Kaz Wilkosz 2

The amount of gas that a helicopter uses varies directly as the number of hours spent flying. The helicopter flies for 2 hours and uses 30 gallons of fuel. Find the number of gallons of fuel that the helicopter uses to fly for 6 hours.

a. 90 gallons
b. 12 gallons
c. 105 gallons
d. 96 gallons

2007-09-26 08:43:05 · 5 answers · asked by . 1

please, any suggestions?
mucho gracias=]

2007-09-26 08:38:36 · 5 answers · asked by ... 2

2007-09-26 08:36:43 · 2 answers · asked by antm071993 1

Are than any steps or shortcuts which will help me get the answer easier other than multipying it over and over again.

2007-09-26 08:35:24 · 7 answers · asked by Anonymous

2007-09-26 08:34:26 · 5 answers · asked by antm071993 1

I need help drawing the contours of f(z)=1/z. I've found Re f =u(x,y) = x/(x^2+y^2) and Im f = v(x,y) = -y/(x^2+y^2). Now what do I do?
Please include an explanation. Thanks...

2007-09-26 08:34:19 · 1 answers · asked by linzaroo06 1

posted this once before but forgot to note that a and b are POSITIVE. need to prove that if 0 or < im assuming[>] ) 1/b.

so if a 1/b.

2007-09-26 08:31:55 · 3 answers · asked by Anonymous

Vector b is subtracted from vector a where ax=3 ay=2 bx=(-3) by=2. What is the x-component of the resulting vector c. What is the y component of the resulting vector c?

2007-09-26 08:30:25 · 4 answers · asked by Andy D 3

Question line.
Please? =(

2007-09-26 08:29:30 · 4 answers · asked by adriana_00000 2

Round to the nearest hundredth percent!

2007-09-26 08:25:59 · 3 answers · asked by Anonymous

I take pride in figuring out problems by myself, but these two darned questions have me stuck.

I know that sin 2x = 2sinxcosx and the basics, but I can't seem to reduce these problems in the right way:

sin2x/sinx - cos2x/cosx = secx

sin (x+y) cos (x-y) + cos (x+y) sin (x-y) = sin2x

please show how you got these, in case I run into similar ones. thanks tons!

2007-09-26 08:24:40 · 5 answers · asked by Fundamenta- list Militant Atheist 5

Ok I am trying to figure out this question about perimeter and area but I need some help.Here is one that I dont get.

*Area of rectangle=42 in sq, width = 3 in.,length =________

Can you please explain to me how to get this?

2007-09-26 08:23:31 · 9 answers · asked by Hannah S 1

2007-09-26 08:21:47 · 3 answers · asked by Anonymous

1. Key in the first three digits of your phone number (NOT the Area code...)
2. Multiply by 80
3. Add 1
4. Multiply by 250
5. Add to this the last 4 digits of your phone number
6. Add to this the last 4 digits of your phone number again.
7. Subtract 250
8. Divide number by 2

Do you recognize the answer ??

2007-09-26 08:19:08 · 9 answers · asked by TD 3

A jet plane is flying at a constant altitude. At time t1 = 0 it has
components of velocity v{x} = 88 m/s, v{y} = 111 m/s.
At time t2 = 29.0 s the components are v{x} = 175 m/s, v{y} = 45 m/s.

For this time interval calculate the average acceleration.
Give your answer as a pair of components separated by a comma. For example, if you think the x component is 3 and the y component is 4, then you should enter 3,4. Express your answer using two significant figures.

Find the magnitude of the average acceleration.

Find the direction of the average acceleration (let the direction be the angle that the vector makes with the +x-axis, measured counterclockwise).

2007-09-26 08:04:37 · 3 answers · asked by Anonymous

2007-09-26 08:02:29 · 4 answers · asked by redbone001 1

A rhinoceros is at the origin of coordinates at time t1=0. For the time interval from t1 to t2 = 12.5 s, the rhino's average velocity has x-component -3.5 m/s and y-component 4.9 m/s.

at time t2= 12.5 s what is the x-coordinate of the rhino?
At time t2= 12.5 s what is the y-coordinate of the rhino?
How far is the rhino from the origin?

2007-09-26 08:02:20 · 2 answers · asked by Anonymous

Can someone solve the following trig equation:-
sin^2(x) = 4cos(x)

Thanks

2007-09-26 07:59:00 · 5 answers · asked by Anonymous

Find a, b, and c such that the parabola y=ax^2+bx+c passes trhought the points (1,-4), (-1,0), and (2,3).

2007-09-26 07:57:45 · 2 answers · asked by rong_xu 1

What could be the u substitution to solve this definite integral? (I assume I need to use u substitution nescessary?)

2007-09-26 07:55:47 · 2 answers · asked by RogerDodger 1

How would I figure out this problem?

2007-09-26 07:55:38 · 12 answers · asked by Anonymous

Find all numbers r such that

| 2 4 2 |
| 1 r 3 |
| 1 1 2 |

is invertible

2007-09-26 07:52:11 · 4 answers · asked by rong_xu 1