Mathematics - 5 July 2007

i don't know...i'm having a serious brain functioning problem right now :P

f(x)=(4x-1)/(2x+3)

2007-07-05 10:23:38 · 6 answers · asked by Anonymous

An airliner flies 3,360 miles in 4 hours with the wind. On its return trip, it took 2 hours flying against the same wind to go 1,360 miles. What was the wind speed?

2007-07-05 10:11:38 · 12 answers · asked by *05* 1

Akira can row downstream a distance of 60 kilometers in three hours. Going upstream, it takes him 4 hours to row 32 kilometers. How fast is the current?

2007-07-05 10:10:39 · 3 answers · asked by *05* 1

2007-07-05 10:09:30 · 9 answers · asked by ailyn alburo 1

Why does this theorem have this name if, in fact, it was never proved by Fermat (although Fermat was, indeed, a great mathematician)? For what I know, it was proved by Andrew Wiles in 1996, I guess.

2007-07-05 10:05:10 · 7 answers · asked by Steiner 7

Employees of a discount appliance store receive an additional 20% off of the lowest price on an item. If an employee purchases a dishwasher during a 15% off sale, how much will he pay if the dishwasher originally cost $450?

2007-07-05 10:00:57 · 8 answers · asked by Anonymous

Please advise, thanks.

2007-07-05 09:53:49 · 4 answers · asked by Anonymous

2007-07-05 09:45:03 · 2 answers · asked by ailyn alburo 1

2007-07-05 09:43:35 · 3 answers · asked by G 1

√128x^3

√15a^8b

-3√150a^7 c^2

-√320y^9 z^10

2007-07-05 09:33:04 · 3 answers · asked by Anonymous

A spherical balloon with radius r inches has volume V(r) = (4/3)r3. Find a function that represents the amount of air A required to inflate the balloon from a radius of r inches to a radius of r + 1 inches.??

2007-07-05 09:32:03 · 3 answers · asked by Anonymous

2007-07-05 09:31:54 · 4 answers · asked by ailyn alburo 1

The measure of the supplement of an angle is 40 less than 3 times its complement. Find the measure of the angle, its supplement, and its complement.

2007-07-05 09:31:08 · 5 answers · asked by ilovehur42 2

Estimate the integral of sqrt (1 + ln xdx) with superscript of 2 and subscript of 1 outside the bracket by using
(a) The trapezoidal rule
(b) Simpson’s Rule.

2007-07-05 09:26:06 · 2 answers · asked by Anonymous

this is very hard to type out but i'll try my best.

find the value of each expression:

a) [both logs have base 2] 2^(log(4)+log(6))


b) e^(3ln(2))


any help would be great! thanks

2007-07-05 09:17:43 · 3 answers · asked by Anonymous

just a tease

2007-07-05 09:14:53 · 5 answers · asked by DC 1

At the Community College of Southern Nevada, it says for an Associates in Business you'll need to take MATH 124 or above but no where in their site or catalog does it list what MATH 124 entails. Algebra? Trig? Calc?

Anyone?
Heres there Catalog:
http://www.csn.edu/academics/2007%2D2008%5FCatalog/

2007-07-05 09:09:06 · 3 answers · asked by Tc C 1

1) the sum of 2 #'s is -2. if twice the smaller # is added to 3 times the larger, the result is 1. Find both #'s.

2) helen has 2 more than twice as many stamps as Gail. If gail buys 10 more stamps, she and helen will have the same amount. How many stamps does each person have NOW?

thanks so much. xD (i really suck @ math. hehe)

2007-07-05 08:47:28 · 6 answers · asked by Anonymous

2007-07-05 08:46:07 · 2 answers · asked by Anonymous

A rectangle is 4 times as long as it is wide. A second rectangle is 5 centimeters longer and 2 centimeters wider than the first. The area of the second rectangle is 270 square centimeters greater than the first. What are the dimensions of the original rectangle.

2007-07-05 08:35:23 · 4 answers · asked by brandon_burdette 1

Choose a person at random and give him an IQ test. The result is a random variable Y. The probability distribution of Y is the Normal distribution with mean μ= 100 and standard deviation σ = 15. The probability P (Y > 120) that the person chosen has IQ score higher than 120 is about?

I tried this a few times, but got different answers, mostly 0.092 and 0.908

Could someone explain the right way to answer this question, and what answer you got, please?

2007-07-05 08:30:28 · 5 answers · asked by ohmygosh 3

1.x^2-5x+6=0
2.2x^2-9x-5=0
3.3x^2+5x-2=0

2007-07-05 08:25:15 · 8 answers · asked by brandon_burdette 1

I know that 3 to the third power is 27 but how much is 4 to the power of 0?

2007-07-05 08:21:37 · 9 answers · asked by Anonymous

1) when Courtney collected her change she realized that she had 5 times as many dimes as quarters. Her dimes and quarters totaled $5.25. How many quarters did she have>

2) A store manager bought "c" calculators for $8 each.All but 4 were sold for $10 each, The remaining four calculators were not sold. Find the store's profit in terms of "c".

thanks for helping. :)

2007-07-05 08:20:28 · 8 answers · asked by Anonymous

2007-07-05 07:54:58 · 6 answers · asked by Anonymous

How do you prove a function when one of the components is only specified as an integer?

For example, how would you prove this function?

Prove: n^5 - n is divisible by 10 for all n is greater than or equal to 2.

Thanks in advance.

2007-07-05 07:51:36 · 5 answers · asked by Antonio P 1

1.a^2-9
2.4a^2-4a+1
3.y^2+16y+64
4.81r^2-36rs+4s^2
5.x^2+3x+2
6.x^2+8x+12
7.72-22x+x^2

2007-07-05 07:51:09 · 4 answers · asked by brandon_burdette 1

1.(x+5)(x+2)

2.(x-2)(x-2)

3.(x+5)(-12)

4.(3c-4d)(2c+5d)

5.(5x-3)(3x-8)

2007-07-05 07:41:20 · 6 answers · asked by brandon_burdette 1

A barrel contains only apples and oranges. There are twice as many apples as oranges. The apples are either red or yellow, and 4 times as many apples are red as are yellow. If one piece of fruit is to be drawn at random from the barrel, what is the probability that the piece drawn will be a yellow apple?

2007-07-05 07:33:58 · 7 answers · asked by Anonymous

please help
solve by compeleting the square. round your answer to the nearest tenth, if necessary?

2007-07-05 07:32:52 · 2 answers · asked by king 1