Mathematics - 20 September 2007

2007-09-20 11:04:45 · 4 answers · asked by Shirley D 2

2007-09-20 10:56:52 · 1 answers · asked by mathfan09 1

Carl's hands trembled as he stood in front of the safe and unfolded the crumpled piece of paper holding the combination that would open the sage. "Rats!" he moaned. The combination was written in the form of a riddle. The last number was described in the following way: Find 2/3 of the final number, add 16, and this number will be equal to two times the mystery number. What was the final number of the combination?

2007-09-20 10:56:50 · 2 answers · asked by iluvcaliii06 2

Please help me!!!

2007-09-20 10:52:00 · 3 answers · asked by WiiBoy360 2

Hey everyone im 16 and i just got my g.e.d and i want to goto college in Jan.. But i only made it to 10th grade and this may sound stupid but i suck at math.. Can someone explain to me how to do this problem please! I dont know why im stuck on this one.
Ive done alot today..

1.) 1/2 + (2/3 / 3/4) - ( 4/5 * 5/6)


If any one any pre-tests for any college math that would be great.

2007-09-20 10:49:41 · 8 answers · asked by riialicious 2

Solve..

7x^2 + y^2 = 64
x + y = 4

I dont get it with there being squared signs in.. I can do simultaneous equations usually...

This work is due in tomorrow by the way!

Thanks...

2007-09-20 10:39:51 · 6 answers · asked by CARLY-R-1991 2

it is used to measure the strength and direction of the linear relationship between two quantitative variables. It is usually written as r.
i uderstand what it is but, i just don't understand why it is between -1 and 1.
could someone please clarify this point for me.

Thanks

2007-09-20 10:35:47 · 3 answers · asked by kris 2

I need help, what is 2+2. HELP!

2007-09-20 10:31:16 · 12 answers · asked by Alan W 2

-12 + 5????

2007-09-20 10:26:53 · 9 answers · asked by lola c 2

The displacement (in centimeters) of a particle moving back and forth along a straight line is given by the equation of motion s = 5sin(t) + 5cos(t), where t is measured in seconds.

a) Find the average velocity during the time period [1, 2].
cm/s

(b) Find the average velocity during the time period [1, 1.1].
cm/s

(c) Find the average velocity during the time period [1, 1.01].
cm/s

(d) Find the average velocity during the time period [1, 1.004].
cm/s

(e) Estimate the instantaneous velocity of the particle when t = 1.
cm/s

2007-09-20 10:24:59 · 1 answers · asked by Anonymous

Ball thrown down from 220 ft building with initial velocity of -22 ft/s
What is its initial velocity after 3 seconds. What is its velocity after falling 108 ft
Position function s(t)= -16t^2 +Vot +So
vo=initial velocity
The part for what is the initial velocity after 3 seconds i got. i just took the derivative of the position function. I don't understand how to do the second part Someone please show me the steps to find velocity after falling 108ft

2007-09-20 10:23:29 · 2 answers · asked by Anonymous

I was given this exercise but I think that something is not right.

I) Let a , b y c three natural numbers so that
3D( a , c ) = 5D( b , c ) (D = Greatest common divisor)

i ) Prove that a is a multiple of 5 and that b is a multiple of 3

This is obvious. I wrote this part because it's necessary to solve the rest of the exercise.

ii) Find N = "xyzy" (x, y, z and y are the digits) knowing that N is a multiple of 5 and that N is a multiple of 9 and that the number "xy" is equals to the number "zy" +10

iii) If 100 ( a + b) + (c / 3) where N is the number found in ii), a is a 2 digits number and a is a multiple of 3 , number of divisors of a = 8 and m( b , c ) = 5985 (m= least common multiple), then find a , b y c

I get two numbers N, 5040 and 9585 but I can't find any solution for the part iii. Perhaps I am missing something. I'd like some of you to tell me what the problem is

a is a multiple of 15 (a= 30 to me), so is c, and b is a multiple of 3

2007-09-20 10:16:09 · 2 answers · asked by MathTutor 6

It's for extra credit in my math class. If you can help, thanks a lot:)

2007-09-20 10:13:23 · 6 answers · asked by David K 1

Can someone please show me an example just by showing the statements?

Given: S is the midpoint of segment RT
AX=ST
XP=RS

Prove: X is the midpoint of segment AP

2007-09-20 10:11:47 · 2 answers · asked by Anonymous

A particle moves along a straight line and its position at time t is given by s(t)=2t^3–18t^2+30t where s is measured in meters and t in seconds.
What is the TOTAL distance travelled by the particle between time 0 and 12?

2007-09-20 10:07:09 · 6 answers · asked by Bikki 3

2007-09-20 10:00:44 · 7 answers · asked by Trina M 1

I just started calculus and i know this is a pretty simple question just mostly using the power rule but i can't seem to get the right answer which is (x^3-8)/x^3

2007-09-20 09:59:38 · 5 answers · asked by Anonymous

using the order of operations

2007-09-20 09:50:08 · 9 answers · asked by x0shortie13x0 2

if 10.3 = 12/b
what is b?
this might not be possible, im not sure...i suck at maths

2007-09-20 09:46:37 · 10 answers · asked by plasticbag 2

pls help meeee!!! i dnt understand

tanx guys

2007-09-20 09:45:17 · 15 answers · asked by -x-lollie-x- 1

Find the error 80% of students could figure this out!! Help!!

2007-09-20 09:45:00 · 4 answers · asked by Jae Rae 3

How would I convert 1.49 x 10^-5

and 9.993 x 10 ^-2

2007-09-20 09:43:13 · 5 answers · asked by San s 1

I don't even know what to do with this problem!! Please help me....

x^2+2x+1=0

and the choices are
1. 0;1 real solution
2. -4, no real solutions
3. 4;2 unequal real solutions

I appreciate any and all help. First with the most helpful answer gets my vote for best answer :P

2007-09-20 09:40:32 · 3 answers · asked by Anonymous

How in the heck do I solve this problem!?!

-28-16i / 1-5i

Any help would really be appreciated!

2007-09-20 09:34:20 · 5 answers · asked by Anonymous

what is true about the following sequence?
(27,29,27,29,27,29,...)
a) it converges to 28
b) it converges to 27
c) it converges to 29
d) it diverges

2007-09-20 09:33:47 · 1 answers · asked by the_hockey_guy1990 1

ok here is the problem; sqrt 6x-2 = sqrt 3x+10

What does x equal? I did the problem but i think i got 3.33, is this the right answer? Please let me know thanks.

2007-09-20 09:28:11 · 3 answers · asked by Anonymous

given that the 1st, 2nd, and 4th terms of an arithmetic sequence are 11-x, 2x+1 and 3x+1 respectively: solve for x and then find t1, t2, t4 and then find S15

2007-09-20 09:27:27 · 1 answers · asked by the_hockey_guy1990 1

i need this by tonight!!! its due tomorrow !!!! please help!!!

2007-09-20 09:14:59 · 2 answers · asked by dayna r 1

What is 15% of 55 pounds or 105 dollars

and

What is 15% of 35 pounds or 70 dollars.

thanks

2007-09-20 09:14:32 · 8 answers · asked by breakthrough_usman 1

Let "V" and "W" be finite dimensional vector spaces and
T: V-->W be linear.
a)prove that if dim (V) < dim(W), then "T" cannot be onto.
b) Prove that if dim(V) > dim(W), then T cannot be one one.

2007-09-20 09:13:47 · 4 answers · asked by amjad 1