Mathematics - 30 October 2007

1.) If 8 and 12 each divide K without a remainder, what is the value of K?

A.) 16
B.) 24
C.) 48
D.) 96
E.) It cannot be determined from the information given.

2007-10-30 11:24:08 · 12 answers · asked by blessed 1

A. -3, -3
B. -3, -4
C. 1, 3
D. 1, -3, 4
E. -2, 5

2007-10-30 11:23:33 · 1 answers · asked by Anonymous

I suck at fractions.


The question is Find one of the factors when x^2 - 11/12x + 1/6 is factored completely.

The answer choices are
a) x - 2/3
b) x + 1/6
c) x - 1/3
d) x - 1/2


I guessed D. but that's wrong.

2007-10-30 11:12:23 · 2 answers · asked by 013291 2

2007-10-30 11:09:53 · 5 answers · asked by You Don't Know Me!!! 2

The numbers Rsub1, Rsub2, and Rsub3 and R satisfy the following equation: (1/Rsub1)+(1/Rsub2)+(1/Rsub3)=(1/R).

A. If Rsub1=1 and Rsub2=2 and Rsub3=3, compute R exactly.
B. If both Rsub1 and Rsub2 are held constant, and Rsub3 is increased by .05, what is the approximate change in R?

Ok, I got part a, that's simple enough. I realize you can solve this easily using a calculator, But how do you do B by using linear approximation?

2007-10-30 11:08:37 · 1 answers · asked by Anonymous

the questions are
1) Which number has all the following characteristics?
Its is prime
it is greater than 90
it is less than 100
it is not a multiple of 3

2) find x if x is prime and 23
3)The area of a rectangle is 36. What could be the dimensions of the rectangle if the lenght and width are whole numbers and neither is a prime number?

4)Find the common multiples of 8 and 20 that are less than 300

5)There is a prime number between 11 and 46 about which a teacher will answer three "yes" and "no" questions from her class. After answering the question, the first student to determine the correct number will get extra credit.
The students asked: 1. is it 5 or 6 more than a perfect square?
2) it is three more than a multiple of 7?
3)is the sum of its digits odd?
The answer were yes, yes, and no, respedtively. What is the number?

2007-10-30 11:05:14 · 4 answers · asked by sweethoney9079 4

for 60 days using the ordinary interest method?

2007-10-30 10:58:13 · 3 answers · asked by Kary M 1

i got

39+13i

my question is, would you simplify it to 3+i

2007-10-30 10:57:13 · 2 answers · asked by ike 3

How many cows left?

2007-10-30 10:51:59 · 42 answers · asked by Alexander 6

running the marathon ( 26.2 miles long)
Thina average speed maintained per mile is 11 min. and 15 sec. She is closer to the front and leaves the starting point at 8:02 a.m.
Manuel is farther behind at the start and he begins his run at 8:15 a.m. Manuel maintains an average speed of 5.8 miles per hour.
How long and at what distance(if it happens) will the 2 be at the same location. and at what time will both kids finish the run?

i need help understanding how to do it

2007-10-30 10:50:04 · 1 answers · asked by crayola 2

http://i78.photobucket.com/albums/j106/Cookie_Calhoun/aaa.jpg

2007-10-30 10:49:11 · 2 answers · asked by Goddess Allure 2

okay hahaha last question. I have a test tomorrow so I'm trying to go over my quizzes to study. Anyways. I'm a little stuck on two of the substitution problems. the first one is just a checking problem.

I've been graphing the 2 equations to make sure I got the right answers, but on the one that is:

x^2 -xy + y^2 =13
I can't remember how to get y-alone. I had this problem before but I'm just not seeing it. But I only need that so I can graph it and check my answers. the second problem is similar

x-2y = 4
x^2 -y^2 =11

I tried get x by itself in the first one but I didn't want to have to square a fraction like that when I substitute it back into the second problem. So I solved for y in the first one and substituted it into the second one. well, I ended up with

5y^2 + 16y + 5 =0
I'm wondering if I did that wrong because it won't factor and I really don't want to use the quadratic formula. I had a negative number under the square root last time. thanx!!!!

2007-10-30 10:47:43 · 2 answers · asked by angelicasongs 5

solve

2007-10-30 10:44:53 · 2 answers · asked by Goddess Allure 2

simplify

(radical sign) -4/7

2007-10-30 10:40:27 · 4 answers · asked by Anonymous

solve the equation...
(3(x+2) -3) / 3 = 6

in word terms: 3(x+2) divided by three and equal to six

2007-10-30 10:37:06 · 6 answers · asked by Anonymous

Find the vertex, focus and directrix of each parabola below.

(1) y^2 + 12y = -x + 1

(2) (x + 4)^2 = 16(y + 2)

2007-10-30 10:30:10 · 1 answers · asked by Anonymous

show work

2007-10-30 10:26:27 · 3 answers · asked by Goddess Allure 2

Problem:
Suppose that a and b are coterminal angles. Also suppose that c and d are coterminal angles. Is it true that a + c is coterminal with b + d. If true it needs to be proven. If not it needs a counterexample.

Im not sure what is meant by this exactly.

2007-10-30 10:11:18 · 3 answers · asked by Anonymous

|x|+|x+1|<5

2007-10-30 09:50:35 · 2 answers · asked by MeMe 1

does anyone know the sum/difference identities of sin and cos? I have a test tonight and I don't have them memorized and don't have my book with me.

the sin2x and cos2x would help as well.

thanks a lot!

2007-10-30 09:47:12 · 1 answers · asked by Nate 6

Use L'Hospital's rule to find
........... ln(x)
....lim-----------
x ->oo .. X^1/2

It looks funny.. Find the Limit as X goes to infinity as the Ln(x) is divided by x^(1/2)

2007-10-30 09:43:19 · 3 answers · asked by Anonymous

I know this has been asked a lot, but the answers I've been through only go so far ...

How can you do sine, cosine and tangent by hand for any angle? And when I say by "hand". I mean a formula.

Thanks so much!

2007-10-30 09:41:04 · 2 answers · asked by Aliya K 2

please show me step by step how to do it

2007-10-30 09:37:21 · 1 answers · asked by Anonymous

Area: 64 square feet

2007-10-30 09:32:49 · 7 answers · asked by nala 1

A shipping box is a rectanglular solid whose volume is 4ft^3. The length of the box is twice its width. The material to make The top and bottom costs $.30/ft^2 and the material for the sides costs $.20/ft^2. Find the dimensions of the box that will minimize the costs.

2007-10-30 09:17:24 · 1 answers · asked by Teresa 2

Solve the system of equations using Cramer's rule

x1 + 2x2 + x3 = 3
x1 + x2 - x3 = 4
2x1 - x2 + x3 = 5

2007-10-30 09:14:27 · 4 answers · asked by iznissin 1

Find dy/dx by implicit differentiation.
1+x=sin(xy^2)

i worked it out and got as far as
1=cos(xy^2)(y^2+2xy)(dy/dx)....i tried to simplify it and got
2xy((1/cosxy^2)-y^2) but i got it wrong

2007-10-30 09:10:33 · 2 answers · asked by lady_divine@sbcglobal.net 1

Sheby has a 40% chance of making a free throw. What is the probability that she will miss the free throw?

2007-10-30 09:09:08 · 11 answers · asked by Rebecca M 1

a, Prove that if A is an n x n matrix, then B = A+A' is symmetric

b, Prove that if A and B are n x n symmetric matrices, then AB is symmetric if and only if AB = BA

2007-10-30 09:08:47 · 2 answers · asked by iznissin 1

Its a conditional statement
For example if M<7 = 135 degrees, then M<1 = ?.

OR

If M<11 =190 degrees, then M<8 = ? .

In my math book it says you can find the measure of all angles if you know the angle of just ONE angle. It doesn't explain how to do it though. Can someone please help?

2007-10-30 09:02:28 · 5 answers · asked by Anonymous