Mathematics - 12 September 2007

2007-09-12 15:59:37 · 3 answers · asked by hanna 1

Factor each of the following polynomials completely -3s^2-10x+8

2007-09-12 15:57:10 · 4 answers · asked by Anonymous

24-5d=d

i've been on this problem 4ever!!!
plz help1

2007-09-12 15:56:12 · 5 answers · asked by Anonymous

2007-09-12 15:55:32 · 2 answers · asked by Anonymous

If EF= 2x-12, FG= 3x-15, and EG = 23, find the values of x, EF, and FG.

x= ?
EF= ?
FG=?

2007-09-12 15:52:00 · 4 answers · asked by Anonymous

For example.....how do you simplify the number 28. What are the steps you take?

2007-09-12 15:51:24 · 4 answers · asked by pebbles11388 2

I'm having horrible trouble with these questions.

1. Prove that if n is a perfect square, then n+2 is not a perfect square.
2. Prove that if n is a positive integer, then n is even if and only if 7n+4 is even.
3. Prove that either 2x10^500 + 15 or 2x10^500 + 16 is not a perfect square.
4. Prove or disprove that if a and b are rational numbers, then a^b is also a rational number.
5. Find a counterexample to the statement that every positive integer can be written as the sum of squares of three integers.

Really, it's been YEARS since I've had a math course before, and I really haven't the slightest idea of even where to start any of these... I'm not asking for a full proof for everyone, but just where I should start and the direction I should go from there...

2007-09-12 15:46:09 · 4 answers · asked by Anonymous

8+(3x+y)i=2x-4i

find the values of "x" and "y" that make the equation true.

("i"=the square root of -1)


how would i be able to solve this problem, there are two variables and only one equation


thank you :)

2007-09-12 15:45:10 · 1 answers · asked by jrfisher8 2

Hi I'm in pre-calc this year and have a test tomorrow. I don't know how to do this. Could someone explain it to me with work???

a. Assume that c does not equal d and a and b are not both zero. Show that ax + by = c and ax + by =d are parallel lines. Explain why the restrictions on a, b, c, and d are necessary.

b. Assume that a and b are not both zero. Show that ax + by = c and bx + ay = d are perpendicular lines. Explain why the restrictions on a and b are necessary.

Thank you so much!

2007-09-12 15:38:43 · 5 answers · asked by Anonymous

2007-09-12 15:37:01 · 3 answers · asked by Anonymous

which the coefficient of x is -3.

2007-09-12 15:36:11 · 2 answers · asked by Anonymous

10/ (1+x)^2

2007-09-12 15:36:00 · 3 answers · asked by MD12 2

2007-09-12 15:32:15 · 15 answers · asked by Anonymous

how many kilograms in 2.5 lb. and how many yards in 23 meters . do u know any website that i could get these answers while your at it..thanx

2007-09-12 15:31:56 · 3 answers · asked by Shy 2

That represents its perimeter.

2007-09-12 15:29:23 · 8 answers · asked by mztana820 1

How can i rationalize [h + sqrt(x+h) - sqrt(x)] / [ h ]

2007-09-12 15:26:38 · 5 answers · asked by Christine N 1

Five different varieties of flowers are growing in a garden: carnations, roses, mums, marigolds, and lilies. Peter and Juanita are responsible for picking flowers and arranging them in vases to sale. They use three different types flowers in each vase. For example, one vase might contain roses, carnations, and lilies. How many different combinations can be made from the five varieties of flowers?

2007-09-12 15:26:06 · 6 answers · asked by Ari 2

In a unit-vector notation, what is the sum of a = (4.00 m) i^ + (3.0 M)j^ and b = (-13.0 m)i^ + (7.0 m)j^ ? (the ^ next the the letters are hats, so i^ would be i hat)
What are the (b) magnitude and (c) direction of a + c (relative to i^)?

2007-09-12 15:24:39 · 1 answers · asked by Anonymous

How do you prove something like this?

If f is one-to-one and g: A-->B and h: A-->B are functions such that fog = foh (composition), then g = h?

2007-09-12 15:24:31 · 2 answers · asked by James 1

2007-09-12 15:23:39 · 2 answers · asked by Anonymous

I don't quite understand how to do this, so can someone help me with this?

2007-09-12 15:18:51 · 2 answers · asked by Danyizzle 4

help i dont understand this lesson !

2007-09-12 15:18:11 · 11 answers · asked by Angiee 2

What is the process and how do i get a solution

2007-09-12 15:17:47 · 3 answers · asked by Eri 1

2007-09-12 15:16:34 · 9 answers · asked by linda c 1

2007-09-12 15:14:14 · 10 answers · asked by hanna 1

1. Consider the polynomials of the form x^2+bx+C, where b and c are integers in the interval (xabs(-10
2. Describe how you solved the problem. Even include thought processes that didn't work.

2007-09-12 15:10:43 · 2 answers · asked by spencer m 1

is there a formula or something?

2007-09-12 15:05:16 · 9 answers · asked by Anonymous

Thanks

2007-09-12 15:00:07 · 4 answers · asked by n 7 2

it says solve by graphing. Check your solution..well I know I gotta do the graphing part..but someone help me on showing the work plz

2007-09-12 14:55:14 · 3 answers · asked by Anonymous

Larry has an annual return of $213 from $3000 invested at simple interest, some at 5% and the rest at 8$. How much is invested at each rate? (Hint: Interest earned = Amount invested x Rate of interest.)

2007-09-12 14:41:57 · 3 answers · asked by Jenny 3