Mathematics - 11 June 2007

Assuming that the tetrahedron has a non-zero volume.

2007-06-11 15:21:48 · 4 answers · asked by Scythian1950 7

Density?

2007-06-11 14:54:22 · 6 answers · asked by wonderwoman 1

ok so my freshman year i had algebra 1 and i didnt do to good...well this next year i will have geometry...i was wondering if there was anything i could do to prepare myself over the summer...like already kno some of the stuff when i get there or any websites with worksheets or anything plz help

2007-06-11 14:52:35 · 6 answers · asked by Anonymous

4 3/5 + 1 4/15....................thank u

2007-06-11 13:51:22 · 16 answers · asked by georgemi74 4

is "b" in the formula Y=ab^x the slope(rate of increase)?

2007-06-11 13:10:34 · 2 answers · asked by Anonymous

Ok our math teacher decided to give us this annoying problem in geometry with very little information given.
So on a graph per say, a line is shot out from (0, 0) to point
(49, 1). A circle with a circumference of 2.5 inches and it's center on point (1,0) has an annual cross growth of 1.5 inches squared (so i'm guessing the area of the circle increases by 1.5 each year). Now if the cylinder's center on 1,0 increase 1.5 inches squared a year, I have to find out approximately how many months it'll take before the line gets intercepted by a side on the circle. Each square unit on the graph is equal to ten feet. I'm sorry for a crappy explanation, I sort've didn't get much better. But basically you have a straight line from 0,0 to 50,1 and a center of the circle at 1,0 that has a starting circumference of 2.5 inches and a growing area at the rate of 1.5 square inches per year. Please tell me someone has some idea of what the heck to do, don't need to do the calculations just the plan.

2007-06-11 12:38:54 · 3 answers · asked by batmankiller123 2

solve the system of equations by substitution there r two different ones
2x+y=-17
4x-8y=36

and the other one is
2y=8
x+3y+2z=19
y-4z=-4

2007-06-11 12:31:21 · 5 answers · asked by CHALEAH J 1

2007-06-11 12:30:06 · 13 answers · asked by k_reggie 3

Maths is very powerfull subject, if know maths and physics very well , u can rule the whole world. But tell me can it be used to predict things which will happen in future ?Exactly with time and location ?

2007-06-11 12:26:25 · 3 answers · asked by yogesh_war1986 1

I know how to do these type of problems but I can't figure out how to do these 2 particular ones.

1) A jogger runs a distance at a speed of 8 mph and returns the same distance at a running speed of 6 mph. Find the total distance that the jogger runs if the total time running is 1 hour and 45 minutes.

2) How many ounces of pure water must be added to 60 oz of an 8% salt solution to make a 3% salt solution?

Thanks!

2007-06-11 12:06:28 · 3 answers · asked by Petey 3

2007-06-11 11:59:06 · 3 answers · asked by Bill W 【ツ】 6

The cost of fuel to propel a boat through the water(in dollars per hour) is proportional to the cube of the speed. A certain ferryboat uses $100 worth of fuel per hour when cruising at 10 miles per hour. Apart from fuel, the cost of running this ferry is $675 per hour. At what speed should it travel so as to minimize the cost per mile traveled?

2007-06-11 11:52:48 · 2 answers · asked by todd_ly2002 2

It's binary number, which has bits B_p set for each prime p.

(I do not know the answer)

2007-06-11 11:42:46 · 7 answers · asked by Alexander 6

x< or equal to 1; y > or equal to 0; 3x+y< or equal to 5

a. infeasible
b. unbounded
c. an optimal solution
d. alternate optimal solutions

2007-06-11 11:31:17 · 4 answers · asked by HOPING 1

Consider the following number:

1/(2)^(1/2) - i*(arcsin(1.235711131719...)) - pi/2) = (a),
which is approximately equal to .03332266499855....
where i is the square root of -1, the decimal digits in the argument of the arcsine function consists of the string of all the prime numbers, and pi is defined to be the ratio of the circumference of a circle to its diameter. Is this number rational or irrational? Or, if one takes the first 100 primes and strings them together approximate the number in the argument of the arcsine function, can someone calculate the number of (a) to 100 digits accuracy?

Inquisitively,

Edwin G. Schasteen

2007-06-11 11:24:23 · 2 answers · asked by Ed S 1

y= x^2 - 12x + 44

this is NOT my homework.its a review for a final and i need to know how to do it.

2007-06-11 11:16:55 · 4 answers · asked by molly 1

how do you calculate the standard deviation and the mean of 190 and 225

could you explain it step by step? thanks

2007-06-11 11:00:36 · 3 answers · asked by ButtErFlY 3

I am studying accounting in college. I have read a section on mark-up percentage and I don't understand where they are getting thier numbers from. They say calculate markup like:
Markup percentage = markup over Sales price. As example they give: a cd reltailers is: Markup percentage= $7.00 over $15.00 = 46.7%. But where are they getting that number? When you put a number over another number doesn't that mean divided by? If thats the case then it doesn't work out. I don't get it, can someone please explain in laymans terms? It would be appreciated. Thanks.

2007-06-11 11:00:21 · 9 answers · asked by Anonymous

sinx = cosx

is it
sinx - cosx = 0
sinx (1 - cosx/sinx) = 0
sinx (1 + tanx) = 0

now i'm stucked. help

2007-06-11 10:56:44 · 5 answers · asked by Ha!! 2

I have a final wednes and i need help!!! i tried reaserching this online but i kept getting mixed information...Corresponding Angles. I know that opposite angles (Angles ontop of eachother) are equal to each other but i keep getting confused about how to tell if a certain angle is equal to another or opposite that angle that is labeled what it is. My teacher said something about making a "z" and when i do that i get the answer of solving "x" wrong. please help...im talking about these kinds of angles http://www.mathnstuff.com/math/spoken/here/2class/260/trans1.gif

2007-06-11 10:55:39 · 10 answers · asked by Anonymous

I need to know the Radian Measure, Reference angle in degrees and reference angle in Radians for the following: 30, 45, 60, 90, 120, 135, 150, 180, 210, 225, 240, 270, 300, 315, 330, 360

Just some examples of some of those would be great. Thanks

2007-06-11 10:50:21 · 3 answers · asked by Anonymous

The square root of 5(x+3)=10

5+ the square root of (x+3)=10

5 times the square root of (x-9) over the sqrt of 4=15

3 over x +1 over 8x=1

x over x-4 +5= 4x over x-4

3 over 7x^2 -16x-15 divided by 12 over 4x^2-36

2007-06-11 10:47:57 · 5 answers · asked by Gianfi 2

(3x - 5) (2x + 3) (x - 4)= 0

2007-06-11 10:45:33 · 4 answers · asked by Big-T 2

why can the pythagorean theorem only be used with Right Triangles and what does it tell about a right triangle?

2007-06-11 10:23:26 · 7 answers · asked by Ninja T 3

Here are just are few questions. Please try answering them, if you can't answer all of them, answer the ones you know. That will be greatly appreciated.

1) Complete the series:

1,8,27,64, ?,? Figure out what comes after 64 and tell me how the pattern works.

2) Give your answer in Arabic numerals.

D C L X V - C C X L I V = ? (It's a subtraction question) Please tell me what I'm subtracting in real numbers like 1,2,3.

3)One hectare is about the size of :

a) a tennis court
b) a hockey field

4) Multiplication is a quick way of:

a) adding unequal numbers
b) doubling numbers
c) adding tens and units
d) adding equal numbers

2007-06-11 09:59:07 · 7 answers · asked by Anonymous

please just help answer a few math problems and please show how the hell you did it cause i dont understand it.

Simplify completely (-3p^4q^-2)^-5

write in standard form y= (2x - 3)(x+2)

write in vertex form y= x^2+9x - 7
and...
write in factored form y= x^2 + 11x - 60

2007-06-11 09:56:49 · 1 answers · asked by Big-T 2

anyone understand this..i dont..well i got a rough answer for x and y but need to doulbe check

2007-06-11 09:56:32 · 3 answers · asked by Anonymous

Classify this function as even, odd, or neither and tell me why:

f(x) = x - lxl

2007-06-11 09:49:34 · 4 answers · asked by Zywiec 2

Q1.Express each ratio as a unit rate.Round answers when needed
$550 for 10 tickets( basically how much 4 one)
$4.99 for 3 pears

Q.2 Express each ratio as a fraction in simplest form
15 to 30
9 to 36

Q.3 Slove for x show work
-17+x=4
-2x=55=75
4(x-3)=48

2007-06-11 09:41:59 · 3 answers · asked by lifes2short27 1

its an algebra question an answer is greatly apperciated

2007-06-11 09:41:15 · 3 answers · asked by Anonymous