Mathematics - 17 October 2007

I NEED HELP

2007-10-17 09:07:13 · 8 answers · asked by longboarder870 2

irrational number, a rational number, and a real number... is this true?

2007-10-17 09:00:07 · 7 answers · asked by ghodt 1

Give me the steps of each one:

6 times x times (-15)

(57 + x) + 36

37 + [ x + (-52) + 18]

2007-10-17 08:45:26 · 13 answers · asked by carmen111 2

Writing in Math: How does knowing 30+7=37 help you find 37+23?

2007-10-17 08:38:00 · 42 answers · asked by l 2

ex:
17+2n=21+2n


i'm so cofused!!!!! please help? please explain everything.
i know it's like this because my teacher went over it.
17+2n=21+2n
-2n -2n

17=21....... but how do you know which one to use?? lke in this case you used -2n to subtract each side and whatever. but why couldn't u use the 21 or 17???? ughhh plz help!!!

also with this one
5+2(k+4)=5(k-3)

which one do u use to like subtract or add by??? plz help me?

2007-10-17 08:30:01 · 9 answers · asked by Soprano 2

Find the coordinates of the vertex.

f(x) = 4x2 + 48x + 8

f(x) = x2 + 8x + 12


f(x) = x2 + 14x + 45

2007-10-17 08:26:10 · 4 answers · asked by Jess 1

Please explain...I'm writing the PSAT in an hour.

2007-10-17 08:24:52 · 5 answers · asked by Anonymous

How do you convert the hexadecimal number 16.3852 to decimal form?? I know the answer is 22.22 but how do you do it? Please show me how to do this manually. THANKS!

2007-10-17 08:15:39 · 5 answers · asked by dkmu 1

Ok so I need to find the I NEED TO MAKE 45% INTO A DECIMAL AND INTO A FRACTION.... i WILL CHOOSE A BEST ANSER BUT YOU HAVE TO SHOW YOUR WORK...!

I ALSO NEED TO MAKE 3/5 INTO A DECIMAL AND INTO A PERCENT ALSO SHOW WORK!!

aND LAST I NEED TO FIND THE PERCENT AND FRACTION OF THE NUMBER 0.15

THANKS!

2007-10-17 08:09:12 · 4 answers · asked by Party_Hottie12 3

Please explain in steps..I am totally lost

A company that manufactures pencil sharpeners has collected the price-demand data. A linear regression model for price-demand data is p = d(x) = 3 − 0.0002x where x is the number of pencil sharpeners (in thousands) that the company can sell at a price of $p. Find the price that maximizes the company's revenue from the sale of pencil sharpeners.

2007-10-17 08:08:04 · 3 answers · asked by Anonymous

what steps do you take to solve?

2007-10-17 08:04:13 · 4 answers · asked by d 1

i need links to websites that can show me what :
acute scalene
obtuse scalene
right scalene
acute isosolese
obtuse isoslese
right isosolese
and equilangular equilateral triangles all look like. if you cant find a website, please explain to me how to make the other ones. please and thank you <333

2007-10-17 07:58:18 · 3 answers · asked by Mrs. Efron <3 2

2007-10-17 07:56:36 · 1 answers · asked by Anonymous

ok, i dont normally do this but its quite urgent, i have maths homework and im running late plz help!

1) A number exceeds four times its reciprocal by 3. find the number forming a quadratic equation.

2) A cyclist travels 40km at a speed of x km/h. Find the time taken in terms of x. Find when his speed is reduced by 2 km/h. If the difference between the times is one hour, find the original speed x forming a quadratic equation.

Plz if u can help... help me :P i know i should be doing my own homework but i have like 30 questions like these still to do! If u can answer one of them, answer... n if both then YAY! i'll give 10 pts for the best answer that will also explain the woking out. THANKS!

2007-10-17 07:50:30 · 6 answers · asked by pwincess_laroosh 2

I am needing to find out how to convert .06715 & .09350 into fractions like 3/32" or 1/4" of an inch.

2007-10-17 07:48:20 · 4 answers · asked by Terry S 2

Using a graph of y = x^2 + 4x - 5 to answer the following:
Using the graph, what are the solution(s) to the equation x^2 + 4x - 5 = 0 ? pleas explain your answers looking at a graph?

Does this function have a maximum or a minimum?
What are the coordinates of the vertex in (x, y) form?
What is the equation of the line of symmetry for this graph?


I know this is hard can anyone help please?

2007-10-17 07:45:27 · 3 answers · asked by jllanos73 2

What is sin(2x)^2 in terms of double angle? How do you get rid of the square? What about cos(2x)^2?

2007-10-17 07:43:21 · 3 answers · asked by V for V 2

Multiple Choice, need help please...i just cant get it. Anything that has a / through it means it is a fraction.

(12, -3) and (1, -1)

A. -11/2
B. 2/11
C. 11/2
D. -2/11


(0, 1/3) and (1/2, 2/3)

A. 2/3
B. -3/2
C. 3/2
D. -2/3

2007-10-17 07:41:54 · 8 answers · asked by banks.gina 1

I need this for a test tomorrow. It is asking for the proof for lemma X. According to the discussion in class we know that when you have something like a mod j. that translate into:

a = jq + r where 0 <= r < j
also r has to be the smallest number possible. I just don't know how to go about it. The lema in question is showned below.

Lemma X : Given j > 1 and k > 1. If a mod jk = 1 then
a mod j = 1 and a mod k = 1.

how can I prove that?

2007-10-17 07:40:28 · 3 answers · asked by mr_gees100_peas 6

Solve 6x^2 + 3x – 18 = 0 using the quadratic formula.

2007-10-17 07:36:59 · 7 answers · asked by jllanos73 2

2007-10-17 07:36:06 · 2 answers · asked by stephen D 1

suppose the random variable X has a geometric distribution with mean of 2.5. determine the following probabilities.

a) P(X=1)
b) P(X=5)

2007-10-17 07:31:39 · 2 answers · asked by Jack 1

Find an equation for line ...
***Multiple choice***


Through (8,1) and perpendicular to y = 4/3x + 4.
(4 over 3)

A. y = -4/3x + 35/3
B. y = -3/4x + 7
C. y = 3/4x - 5
D. y = 4/3x - 29/3


Through (5, -6) and parallel to y =-1/2x + 4.

A. y = 2x - 16
B. y = -2x + 4
C. y = -1/2x - 7/2
D. y = 1/2x -17/2


Through (-3, 6) and vertical.

A. x = 6
B. y = -3
C. y = 6
D. x = -3

2007-10-17 07:28:43 · 3 answers · asked by banks.gina 1

There is a rectangular piece of carpet with a perimeter of 34ft. Another piece is half as long and twice as wide. It's perimeter is 26ft. What are both's dimensions?

2007-10-17 07:21:22 · 9 answers · asked by Anonymous

i am having real dificulty fing the lowest common multiple of 5445 and 2244 please can anyone help

2007-10-17 07:18:44 · 4 answers · asked by brummie_bykerbabe 2

2007-10-17 07:06:24 · 10 answers · asked by Kary M 1

this is a fraction is the answer -15x^2-30x+4?

2007-10-17 07:03:01 · 7 answers · asked by ann m 1

I've been told both sides of this story- I've been told that 1 is the 1st prime number but also that two is!

2007-10-17 07:02:40 · 20 answers · asked by Seadhach 2

2007-10-17 06:53:52 · 3 answers · asked by electra 1

7x - 2y - 8z

2007-10-17 06:52:49 · 13 answers · asked by V.S. 2