Mathematics - 8 September 2007

I have a few out of a hundred if anyone is willing to help me out and also explain the steps? Thank you in advance!

1) In what quadrant does the point (-2,5) lie?

2)Simplify: 3 times square root of 63

square root of 10 times (square root of 2 plus 2)

3)Find the hypotenuse when two legs of a right triangle are 6cm and 3 cm.

4) Solve for y: y-4 =3
x+3 4

5) factor: x squared-5x+6

6) let y= x squared +2x-3

7) Solve for x by taking the square root of both sides: (x-2) squared = 9

I know it's a lot and thank you again!

2007-09-08 12:20:40 · 4 answers · asked by Anonymous

how do u use the forula y=Mx+b

2007-09-08 12:14:47 · 7 answers · asked by dodgerpup373 2

Is this derivation really correct? Or is there somewhere a mistake? If so, where?

2 = 1
******

Suppose: a = b

It then follows that

a * a = a * b

a^2 = a * b

a^2 - b^2 = a * b - b^2

(a - b) * (a + b) = (a - b) * b

a + b = b

a + a = a

2 * a = 1 * a

2 = 1

2007-09-08 12:02:05 · 7 answers · asked by Anonymous

is 142°10' the same as 142°? i don't think so, but what does that 10' mean??

2007-09-08 11:49:16 · 3 answers · asked by paulinatran10 1

1. lim [(3/x-2)- (3x/x^2-4)]
x->2+

2. lim [(3/x-2)- (12/x^2-4)]
x->2+

2. lim [(2/x-2)- (6x-x^2x^2-4)]
x->2+

2007-09-08 11:47:15 · 3 answers · asked by Obser V 1

Why doesn't this equation extend into the negative xy and zx plane?

2007-09-08 11:44:16 · 3 answers · asked by math q 2

If you multiply me by 2, subtract 1, and read the reverse the result you'll find me. Which numbers can I be?

2007-09-08 11:34:20 · 7 answers · asked by Anonymous

Can someone please explain how to work this problem out and exactly why that is the answer? I did it, but im not sure if I am right and the data that I have does not make sense to me.

Show which is relatively better, and why: a score of 88 on the first test, or a score of 70 on the second test. Scores on the first test have a mean 80 and a standard deviation of 10. Scores on the second test have a mean 64 and a standard deviation of 6.

I did a little chart, but im not even sure if it is right. (I had to add the ex's cause the data came out weird without it. The chat might still not come out right on here for some reason.)

0 10 20 30 40 50 60 70 80 |90 100 110
xxxxxxxxxxxxxxxxxxxxxxxxx-----68----
xxxxxxxxxxxxxxxxxxxxx----------95----------
xxxxxxxxxxxxxxx ----------------99.7---------------


66 |72 78 64 70 76 82 88
xxxxxxx -----68----
xxxx----------95----------
---------------99.7--------------

2007-09-08 11:14:54 · 4 answers · asked by preteargraphic 1

I understand that the curve is a spiral, and that x^2+y^2=1. But what happens to x=t? if that becomes one, how?

2007-09-08 10:57:47 · 2 answers · asked by math q 2

my car gets 7L per 100km what is that in Miles per gallon

2007-09-08 10:45:07 · 5 answers · asked by Anonymous

exp=exponet
i need help

2.5731 x 10[exponet 2]
+
3.60 x 10 [exponet -1]
+
7.482 x 10 [exponet 1]
=

a) 3.68 x 10 [exp. 1]
b) 7.78 x 10 [exp. 1]
c) 1.37 x 10 [exp. 1]
d) 3.3249 x 10 [exp. 2]

2007-09-08 10:40:48 · 6 answers · asked by Erin 2

solve for k: |k-4|=10

answer should be like this:

{a number here, another number here}

2007-09-08 10:38:45 · 16 answers · asked by Anonymous

X has coordinates (a , 3a), and Y has coordinates (-5a, 0) Find the coordinates of the midpoint of (XY).
Ok, so I know how to set up the equation so that it's

(a + -5a) /2 , (3a + 0)/2

How do I find out what a is? Do I just set them equal to each other or something because when I did that a ended up equaling zero. (probably did something wrong)
Could someone show me how you work it out?

Thanks

2007-09-08 10:37:10 · 5 answers · asked by Lilaznboi2011 2

I can't figure that out. Please help me, thanks!!

2007-09-08 10:34:24 · 8 answers · asked by gamer31924 2

I have not taken math in over 30 years. My degree requires college algebra.I want to do as well as possible on placement math test. I do not expect to be able to take college algebra immediately, but would like to spend no more than 1 semester to prepare for it. Can anyone suggest on-line or other "refresher sites" to go to starting with the basics?

2007-09-08 10:32:23 · 4 answers · asked by In trouble 1

2007-09-08 10:30:19 · 4 answers · asked by Shepard S 1

calculate (to 1 decimal accuracy) the perimeter of a regular octagon inscribed in a circle of radius 10cm

2007-09-08 10:24:36 · 6 answers · asked by Anonymous

Let M and N be two 9-digit positive integers with the
property that if any one digit of M is replaced by the digit
of N in the corresponding place (e.g., the `tens' digit of M
replaced by the `tens' digit of N) then the resulting integer is
a multiple of 7.
Prove that any number obtained by replacing a digit of N by
the corresponding digit of M is also a multiple of 7.
Find an integer d > 9 such that the above result concerning
divisibility by 7 remains true when M and N are two d-digit
positive integers.

2007-09-08 10:00:12 · 3 answers · asked by Mugen is Strong 7

if something was $275
but went on sale for $195
what percent reduction is this? (what percentage
was taken away)

2007-09-08 09:58:13 · 4 answers · asked by Anonymous

2007-09-08 09:50:29 · 6 answers · asked by satishudhani 1

Meaning 2 to the power of 3/2

2007-09-08 09:46:41 · 9 answers · asked by Bob Dower 2

Assume that a 10X objective has a field diameter of 1.0mm. What would be the estimated field diameter of a 50X objective, in MICROmeters?

I would appreciate any help...thanks :)

2007-09-08 09:42:37 · 1 answers · asked by Pooh 4

please help with explanantion thanks in advance

2007-09-08 09:42:27 · 2 answers · asked by master c 1

find the function (f . g)(3) (the dot indicates multiplying f and g

2007-09-08 09:35:57 · 3 answers · asked by Nanna2 1

I am having a few problems, I know the answers from plugging them in, just dont know how to find them by working them out. could you demonstrate the proper ways to work them?

1a,
2(1+x)=3x
X=2

1b,
(x+1)(x-1)=x^2-x
x=1

1c,
(x+1)^2=x^2
x=-1/2

your help will be appreciated

2007-09-08 09:32:39 · 12 answers · asked by Anonymous

A jet spends 1 hour and 15 minutes flying passengers 215 mile from Washington, D.C, to Newark, New Jersey. How many miles per minutes and miles per hour is the jet traveling?

Study this problem. To find the solution for this problem, you must convert measurements from one unit to another. What is the ratio showing how fast the jet carries passengers between Washington, D.C, and Newark, New Jersey? State the time in the denominator as a decimal.

CAN SOMEONE ANSWER THIS ONE FOR ME? PLEASE!!!!!!!!!!!

2007-09-08 09:32:23 · 2 answers · asked by Kandy 2

1. [2e^(-x) - xe^(-x)] / (1-x^2) > 0

2. (4x + 1)^(1/3) + (4/3)x (4x + 1)^(-2/3) = 0

your assistance would be greatly apprieciated and the winner or right answer will be awarded my ten points. thanks and good luck!!

2007-09-08 09:31:37 · 3 answers · asked by Uriel 3

one rectangular box is 30cm long, 15 cm wide, and 10cm deep . A second rectangular box is 25 cm long ,16 cm wide , and 15 cm deep . which box has the larger volume?

2007-09-08 09:28:33 · 12 answers · asked by hi ! (: 3

please help with little explaination thanks in adavance

2007-09-08 09:24:58 · 9 answers · asked by master c 1

2007-09-08 09:19:33 · 4 answers · asked by Anonymous