Mathematics - 14 October 2007

thanks for any help you can provide!

2007-10-14 09:08:10 · 5 answers · asked by Anonymous

1. x=fp both f and p are measured in inches
2. x=7t^3 T is measured in feet
3.x=y/z y is measured in cubic centimeters and z is measured in centimeters
4.x=1/2at^2 A is measured in meter/sec^2 and T is measured in seconds

2007-10-14 09:06:19 · 1 answers · asked by Anonymous

A gas tank with a capacity of 18 gallons is empty. A pump can deliver g gallons of gas every t seconds. In terms of g and t, how many seconds will it take this pump to fill the tank?

2007-10-14 09:06:12 · 3 answers · asked by Harsimar D 1

solve the system of equations.
6x + 2y = 3
3x + y = 2

2007-10-14 09:05:57 · 3 answers · asked by lynne 2

trigonometric function at t. (4/7, ^/33/7) find sin t.

1. ^/[]33 over7
2. ^/[]33 over4
3. 4^/[]33 over33
4. 4/7

2007-10-14 09:04:40 · 2 answers · asked by dilljam1977 1

2007-10-14 08:58:44 · 3 answers · asked by jordanx1977 2

A trough is 16 ft long and its ends have the shape of isosceles triangles that are 3 ft across at the top and have a height of 1 ft. If the trough is being filled with water at a rate of 13 ft^3/min, how fast is the water level rising when the water is 9 inches deep?

2007-10-14 08:52:46 · 1 answers · asked by Anonymous

Find the exact roots (algebraically) for the cubic equation x^3-5x^2-7x+51=0 (include a list of all possible integral roots) Support your findings with the graph of an appropriate cubic polynomial, clearly explainging how this graph confirms your algebraic solution:
This is my solution :
x^3-5x^2-7x+51=0
f(-3)=(-3)^3-5(-3)^2-7(-3)+51
=0 therefor (x+3) is a factor

(x^3-5x^2-7x+51) divided by (x+3)
= x^2-8x+17 therefor x^2-8x+17=0 is a factor...
so the following roots are x=-3 and x=+-squareroot -4 all over 2

2007-10-14 08:51:56 · 2 answers · asked by Anonymous

My 6th grader has a project that I am stumped on. It has to be a timer that measures 10 seconds consistently, opperate with little effort, and sturdy. It will be measured on square centimeters, cubic centimeters, and mass they are looking for it to be small and light weight and has to be aesthetically pleasing. Wow they are not asking for much are they and this is only 6ht grade! Thank you for anyone who can help me with any ideas.

2007-10-14 08:51:40 · 1 answers · asked by Shawn 1

While traveling across flat land, you notice a mountain directly in front of you. The angle of elevation to the peak is 2.5 degrees. After you drive 17 miles closer to the mountain, the angle of elevation is 9 degrees. Approximate the height of the mountain.

2007-10-14 08:49:34 · 3 answers · asked by yoursmilemakesme 2

If someone could give a little help on this problem I'd really appreciate it. I've been trying to solve this for 2 hours.
yz=n(2y+2z)+4µ
xz=n(2x+2z)+4µ
xy+n(2x+2y)+4µ
2xz+2xy+2yz=1500
4x+4y+4z=200

2007-10-14 08:43:15 · 1 answers · asked by Anonymous

it wants me to state the points at which the curve crosses the X axis, and or state the equations of any asymptotes.

so the function that is being applied is f(x)=1/x

the questions is - a, f(x+2)



Can someone do it, step by step.
its the 1/x that that is bugging me

2007-10-14 08:40:11 · 1 answers · asked by wonderboy 2

A 13 foot ladder is leaning against a house when its base starts to slide away. By the time the base is 12 feet from the house, the base is moving at the rate of 5 ft/sec.
At what rate is the angle between the ladder and the ground changing at that moment?

explanation please..

2007-10-14 08:32:30 · 2 answers · asked by dunkn_donut 1

A corner lot has dimensions 25 by 80 yards. The city plans to take a strip of uniform width along the two sides bordering the streets to widen these roads. How wide should the strip be if the remainder of the lot is to have an area of 921 square yards? Please label the unknown quantity as x.

2007-10-14 08:30:23 · 1 answers · asked by yo yo ma 2

I have to do a question where I have to differentiate using the quotient rule, but I can't even differentiate part of it.
The bit I'm stuck on is differentiating y=ln(x^2+4)

Any help would be much appreciated, thanks!

2007-10-14 08:28:00 · 4 answers · asked by Anonymous

10+12+14+.....+x=306 x=?

2007-10-14 08:14:12 · 4 answers · asked by summer-night-dream 4

s=4t^3 where t is measured in seconds. Find the average velocity of the particle over the time interval [6,8].
Find the (instantaneous) velocity of the particle when t = 6.

2007-10-14 07:55:31 · 2 answers · asked by simonkf2002 1

This problem is giving me, well...problems:

f(x) = 3x csc(8 x)

How exactly would one derive this?

2007-10-14 07:55:16 · 3 answers · asked by AppleCard! 2

Can someone explain to me how to do this problem?

Using the Power Rule, show that the slope of the graph y = x2 at any point x is exactly halfway between the slope of the forward secant on [x, x + h] and the slope of the backward secant on [x−h, x].

Why is this never the case for y = x^3 and y = sqrt(x)

2007-10-14 07:51:14 · 2 answers · asked by Avi J 1

need help!'
transversal cuts two parallel lines.
given:
m m WHAT IS THE VALUE OF X?

THANKS.

2007-10-14 07:51:06 · 3 answers · asked by Anonymous

2007-10-14 07:43:00 · 5 answers · asked by bearbear 1

I'm very confused about math...Algebra actually...
Lets say you have 3 consecutive numbers, and the sum of them is 21...
You would do...
x + x + 1 + x + 2 = 21
3x +3 = 21
3x = 18
x = 6
But if you have 3 consecutive odd numbers, you would do x + x + 2 + x + 4...
WHY?!?! If you have 1 as x, then you'll get 1, 3, 5 for the numbers, and it would make sense... But if you have 2, 4, 6, it wouldn't make sense!!!
So basically... I want to know...
1) What's the reasoning behind the 3 consecutive odd numbers thing... Can someone explain how you make the equation?
2) Did I even get the odd numbers equation right?
3) What's the equation for 3 consecutive even numbers?
4) What's the reasoning behind the 3 consecutive even numbers thing? EXPLAIN!!!

THANK YOU!!!
And please don't just repeat what I said... I'm looking for explanations!

2007-10-14 07:40:15 · 6 answers · asked by Dramaqueen8283 1

this is an algebra question. 8 +sqrt of -20 divided by -4.

2007-10-14 07:38:49 · 2 answers · asked by deb 1

This is the function: x^3 - x^2 - x - 2

how many complex zeros does this function have?

classify each zero as real, rational, irrational, or imaginary

2007-10-14 07:22:55 · 3 answers · asked by Anonymous

I pull into the driveway between a fence and my house, with not much room to spare. Then the driveway fans out into three spaces: One straight a head, another to the right , and another to the right again. On the far right is a row of hedges where I park. I have no trouble pulling in without hitting the hedges. However when I pull out, I can barely get the back end of the car between the fence and the house without scratching the right front fender on the hedges. Related to this is the question: Is backing up a reciprocal function to going forward? In other words, if I could replicate my steering when backing up (in relation to distance traveled), would the car go over the same path? If the answer is yes, then I just need to improve my driving skills. But I suspect that since the car is wide in relation to the spaces involved, it may not be reciprocal.

2007-10-14 07:19:20 · 2 answers · asked by Anonymous

If the midpoints of the sides of a triangle are connected, the area of the triangle formed is what part of the area of the original triangle?

2007-10-14 07:10:20 · 9 answers · asked by Andreas 1

function: f(x) = x^3 - x^2 - x - 2

1. list all possible rational roots

2. find all real rational roots

3. find any irrational roots (exact values where possible)

4. find imaginary roots of function (exact values where possible)

5. How many complex zeros does your function have? classify each zero as real, rational, irrational, or imaginary.

6. write your function as a linear factorization

7. describe the intervals of increase and decrease

8. find local max and min

9. find where f(x) < 0, f(x) > 0, and f(x) = 0

2007-10-14 06:50:19 · 2 answers · asked by Anonymous

1, 2, 3, 4, ,5 ,6 ,9 , 10 , 18, 20, 30 , 36 , 45 , 60 , 90

2007-10-14 06:46:18 · 0 answers · asked by Erin<3 1

2007-10-14 06:43:27 · 3 answers · asked by crystal_clear_girl238 1

the legths of 2 sides of a triangle are 12 and 2 , respectivly, what is one posible legth of the 3rd side??

2007-10-14 06:43:15 · 9 answers · asked by Anonymous