Mathematics - 10 September 2007

x^2= x to the second power, you are suppose to use the quadratic formula -4 + or - the square root of b^2-4ac/2a

2007-09-10 17:21:01 · 6 answers · asked by A_FAST_DUDE 2

three terms are in Arithmetic progression. if their sum is 21 and the sum of their squares is 149, what are the numbers?

2007-09-10 17:20:19 · 2 answers · asked by poiuyt 2

David Murray sells cars. He makes a base salary of $1000 per month plus a commission of 1% of the selling price of each car. For six months Mr. Murray has tabulated the number of cars he has sold for each month and the amount of money he made. If Mr. Murray sells only five cars in month seven how much money will he make?

Number of Cars Sold /// Money Made
18 ///3544
22 ///4108
10 ///2413
11 ///2554
14 ///2978
17 ///3401

2007-09-10 17:09:38 · 8 answers · asked by Anonymous

surds..

and what does it mean when there is 2√3

(wen there is a 2 square root 3?)

how do you get that? (above)

pls do you know any basics and tips about surds?

thank you

best answer for answer which helps in most detail

thanks

2007-09-10 17:09:34 · 8 answers · asked by Anonymous

2007-09-10 17:08:11 · 4 answers · asked by jewel7962002 1

In a rectangular piece of cardboard with perimeter 20 ft. Three parallel and equally spaced creases are made. The cardboard is then folded to make a rectangular box with open-square ends.
a. Show that the volume of the box is V(x) = x^2(10-4x)
b. What is the domain of V?
c. Find the approximate value of x that maximizes the volume. Then give the approximate maximum volume.

2007-09-10 17:06:16 · 3 answers · asked by Anonymous

How do you find volume of water? i mean what is the formula for finding volumes of liquids?

2007-09-10 17:01:54 · 6 answers · asked by James 2

one of the way that biologists estimate the number of individuals of a species in an area is as follows. first, 100 animals of the species are caught and marked. a period of time is permitted to elapse, and then b animals are caught. if c of these(c is less than or equal to b) are marked, find the number of individuals in the area.

2007-09-10 16:58:18 · 1 answers · asked by cherry_bananas_cookies 4

solve for the letter
2by-2a=ay-4b :y
2x-a/b= 2x-b/a :x
x-a/ x-b= x-c/x-d : x
1/ay+1/by = 1/c :y

2007-09-10 16:53:13 · 1 answers · asked by MARIA C 1

plz i know this is easy , i just cant get it!

2007-09-10 16:53:09 · 1 answers · asked by Anonymous

2007-09-10 16:52:33 · 5 answers · asked by Katie 4

Simplify:

2z^3 + 6z^2 + 18z (divided by) z^3 - 27

Will give best answer!!

2007-09-10 16:50:21 · 3 answers · asked by charmedrules10 2

Don is camping out by a clear mountain stream and decides to make some rice. The cooking directions asks for 1 quart of water, but Don had only a 7 quart jug and a 11 quart jug. Don hates dry rice and he hates sticky rice how can he measure to exactly 1 quart? By the way he can get as much water as he like and waste it

2007-09-10 16:50:17 · 5 answers · asked by Anonymous

2007-09-10 16:48:10 · 8 answers · asked by chester 2

2007-09-10 16:43:48 · 9 answers · asked by texan3715 1

2x+3y=1
4x-y=29

2007-09-10 16:42:55 · 2 answers · asked by Anonymous

it says to find all 6 trigonometric functions for this...

pheta= tan^-1(-5/12)


please help!! thank you

2007-09-10 16:41:52 · 3 answers · asked by Katie 4

Find the magnitude and direction(s) of the following vector.

C=-2i -3j +4k (2 angles are needed)

Details Please

2007-09-10 16:40:40 · 2 answers · asked by Anonymous

solve by using elimination plzz

2007-09-10 16:38:29 · 5 answers · asked by lover 1

2007-09-10 16:37:46 · 2 answers · asked by Jen 4

A cone is inscribed in a sphere of radius 6.
a. Express the function of x. ( Hint V = 1/3 pi times r^2 times h)
Then give the domain of this function.
b. Find the approximate value of x that maximizes the volume. Then give the approximate maximum volume.

2007-09-10 16:37:36 · 3 answers · asked by Anonymous

2007-09-10 16:34:33 · 1 answers · asked by deepu 1

How do you convert 750 picograms into grams?

2007-09-10 16:27:12 · 4 answers · asked by Diamond 3

can some one please explain the steps in figuring these type of math problems

2007-09-10 16:25:19 · 11 answers · asked by michelle r 1

A polynomial p(x) . Given that p(x)>0 for all x>a, a is real number.
PROVE - if p(-x) = q(y) then q(y) <0 for all y < -a

2007-09-10 16:24:35 · 1 answers · asked by Falcon Feather 2

choose a variable to represent the unknown number and write the correct equation
"The sum of two times a number and ten is equal to forty-four"

2007-09-10 16:19:27 · 3 answers · asked by Anonymous

OK, so here's the question: The expression 2(l+w) can be used to find the perimeter of a rectangle with a length l and width w. What are the length and width of a rectangle if the area is 13.5 square units and the length of one side is 1/5 the measure of the perimeter? Explain your reasoning.
I figured out the answer. I figured out that if two sides must be 1/5 of perimeter each and two sides must be 1.5/5 of perimeter. So I figured out that the sides must be 3,3,4.5,4.5 units each to equal a perimeter of 15. However, I just figured this out by plugging in numbers until all factors were met. I know there must be a formula to figure out this answer and I need to show my daughter that. Please help this 30+ year old who has forgotten her math knowledge! I need help with the "explain your reasoning" part. Thanks!

2007-09-10 16:11:31 · 12 answers · asked by JM 2

hi im having trouble with integers and dont know how to do any question with them involved so do you subtract and add integers??
eg. positive5+negative8=???
and negative 5 - negative 3
and negative 7-positive 2

2007-09-10 16:09:20 · 5 answers · asked by Watching it all fall. 4

2007-09-10 16:06:16 · 11 answers · asked by akopyan123 1

How do i simplify these equations?

1.x/12x^2

2. 2x+6/x^2 - 9

3. 3 x square root of 7 + 4 x square root of 7

4. 9 x square root of 2 - 12 x square root of 8

2007-09-10 15:45:56 · 3 answers · asked by stephen s 1