Mathematics - 10 September 2007

Ben was 20 years old in 1980, but only 15 years old in 1985.
How come?

2007-09-10 10:05:38 · 4 answers · asked by Christine P 5

I need the ratio of 7.98 x 10^7 to 2.21 x 10^7

I'm getting 798:221

2007-09-10 10:03:08 · 3 answers · asked by grouchy187 2

ok. what is a good message about math that i can write about? and what picture can go with that? plz help i really not good at this.!

2007-09-10 10:03:05 · 6 answers · asked by Anonymous

the height 'h' meters above the ground of a ball 't' seconds after it has been thrown up in the air is given by the expression: h=1.5 + 3t - 2t^2
1)from what height is the ball thrown?
2) at what time does the ball hit the ground?
3) what is the greatest height that the ball reaches?

2007-09-10 10:02:16 · 7 answers · asked by Anonymous

In the given triangle, find to the nearest centimeter the length of the side marked x.
http://www.crunchyroll.com/user/babiixjen_x3/photos/2239630

2007-09-10 09:59:27 · 8 answers · asked by Anonymous

4x+3(2x-5)+6(1-5x)

The answer to this question is
-10-9


but what are the steps on solving this equation...????

2007-09-10 09:57:18 · 10 answers · asked by Anonymous

Determine whether the sequence is increasing, decreasing, or monotonic. Is the sequence bounded?

1) an= 1/(2n+3)

2) an= n + 1/n

can you show the steps/explain..thanks

2007-09-10 09:51:07 · 1 answers · asked by Anonymous

A sequence {an} is given by a1= (radical 2) and a(n+1)= radical (2 + an).

a) by induction or otherwise, show that {an} is increasing and bounded above by 3. Apply the Monotonic Sequence Theorem to show that lim n -> infinity of {an} exists.

b) Find lim n -> infinity of {an}

2007-09-10 09:50:24 · 1 answers · asked by Anonymous

When you divide the same units into something (like 10kg/5kg) the unit remains. I know the answer is 2 m/s, but how do I get there?

2007-09-10 09:45:19 · 2 answers · asked by seventhyearfalling 2

What is 12 - 54 divided by [5 + 2 (8 divided by 4) ]

2007-09-10 09:30:50 · 4 answers · asked by lindsey12 1

a farmer has 60m of fenceing to make a pen for a goat. he wants to make the area of the pen as large as possible.
The length of the pen is x meters
1)write down an expresision in terms of x for the width of the pen
2) find an expression for the area of the pen
3) write this expression in the completed square form
4) what value of x make the area af the pen as large as possible. What is this area?

2007-09-10 09:27:36 · 7 answers · asked by Anonymous

What is 12 - 54 divided by [5 + 2 (8 divided by 4) ]

2007-09-10 09:23:53 · 4 answers · asked by lindsey12 1

12(10-(5 exp.2 -6)3/6)

2007-09-10 09:16:52 · 1 answers · asked by Anonymous

2007-09-10 09:15:47 · 4 answers · asked by Anonymous

Does anyone know an algorithm that I can use to convert decimal numbers to fractions? I am trying to make a program on my calculator, so please keep that in mind when answering, as the calculator can't do many of the things that you and I could.

2007-09-10 09:13:15 · 5 answers · asked by Mnementh 2

"Algebraically determine the symmetry of the graph of the relation."

How would I go about doing this? (The symmetries are x-axis, y-axis, origin, and line y=x) - please use my first exercise as an example:

y = x^4 - 2x^2

Thanks!

2007-09-10 09:12:45 · 4 answers · asked by Brad 2

#1[[fraction...a+1 over 8= a half[1 over 2]

#2[[a-5 over 4= a half[1 over 2]

#3[[3a + 5=5a-3]]

#4[[a over 3-2=10]]

#5[[4a-2+7=17

2007-09-10 09:05:26 · 2 answers · asked by starz_n_smilez 2

Hence, solve (y+8/y)^2 +3(y+8/y)-54=0

2007-09-10 09:02:13 · 12 answers · asked by Cady 1

How can I solve this by factoring?

2007-09-10 08:58:42 · 3 answers · asked by vietx69 2

What is 3/5 + 3/5=???

2007-09-10 08:45:06 · 6 answers · asked by Anonymous

r+6/5 = r+8/7

2007-09-10 08:44:33 · 4 answers · asked by . 1

in a triangle(all the angles are smaller than 90 degrees).
AB=a
BC=b
AC=c
S=the area
S/a*c=2/5
S/a*b=3/8
find the angles of the triangle

2007-09-10 08:40:43 · 3 answers · asked by Anonymous

Find the equation of a line through (-4, -8) and (2, 7)?

2007-09-10 08:35:50 · 7 answers · asked by sweet_candy 2

Three consecutive integers have the sum of 153.
What is the first integer?

Five times the first of three consecutive even integers is fourteen more than three times the second.
What is the third integer?

Thanks!

2007-09-10 08:29:24 · 8 answers · asked by Anonymous

If anyone could help with any/all of the following questions it would be greatly appreciated. I am so confused..

**arc_ = the inverse if you didn't know**

1. arctan(2x-3)=pi/4
2. arcsin(3x-pi)=1/2
3. arctan(2x)= -1
4. arcsin(the square root of 2x)=arccos(the square root ofx)

5. find tan [arcsec(root 5)/2]
6. find sin (arc sec(x))
7. find csc [arctan(x/root2)]

also if anyone knows the domain and range of csc(x), sec(x), and cot(x) that would be helpful too.

Thanks!

2007-09-10 08:25:09 · 4 answers · asked by dunkn_donut 1

Outside of school, where are matrices used?

2007-09-10 08:18:21 · 5 answers · asked by ryan49321 3

How can I factor this?

2007-09-10 08:11:51 · 5 answers · asked by vietx69 2

i really do not get percentages, will some one explain them to me?!?

2007-09-10 08:00:53 · 9 answers · asked by unbreakablexxx3 2

-1/3|2x+7|=2


its a abolsute value question help!

2007-09-10 07:40:27 · 5 answers · asked by Kwan L 2

a. integers
b. rational
c. irrational
d. reals

2007-09-10 07:33:43 · 10 answers · asked by XxVaneSsaXx214 3