Mathematics - 14 October 2007

2007-10-14 15:17:28 · 9 answers · asked by Anonymous

How would you solve
2a + c = -10
b - c = 15
a - 2b + c = -5 ??

2007-10-14 15:17:10 · 1 answers · asked by Anonymous

1/3 (c+1) = 1/6(3c - 5)

1/4(5 - 2h) = h/2

2007-10-14 15:16:03 · 2 answers · asked by Anonymous

2007-10-14 15:15:00 · 1 answers · asked by judykharrison 1

solve for x,
do
-2500 minus 4.05x
what is x

other words do -2500 - 4.05 * something to get 0

2007-10-14 15:08:36 · 5 answers · asked by pumacat 1

2007-10-14 14:55:15 · 8 answers · asked by dr.whooo 2

how do you simplify 1(-x) to the 5th power
whats the answer and how do you get it
thanks so much :]

2007-10-14 14:55:13 · 3 answers · asked by Anonymous

2007-10-14 14:48:06 · 4 answers · asked by Janie 2

We haven't learned this yet and our textbooks don't explain it. But yet, this is on our hw. And I can't find how to do this on google. HELP!!!!! Thanks for any info!!!

2007-10-14 14:46:34 · 3 answers · asked by Anonymous

Please help

2007-10-14 14:42:50 · 3 answers · asked by Anonymous

2007-10-14 14:40:43 · 11 answers · asked by Anonymous

Can someone check my answer for this question:
Find the directional derivative of f(x,y) = x/(x+y) at P(1,0) in the direction of Q (-1,-1).
Ok so the answer I am getting is 1/sqrt(2) but the answer at the back of my book is 1/sqrt(5). I have rechecked all my workings but still can't get the solution which matches the answer in the book. Can someone tell me if the answer I got is right...thanks :):):)

2007-10-14 14:36:41 · 2 answers · asked by Anonymous

travel that 30 miles at 24 mph, what did he do wrong, what should the correct answer be and why! WORTH 10 well earned points.

2007-10-14 14:34:44 · 3 answers · asked by Anonymous

How do you solve this guys and girls help me.

Radical 98x^3 / rad 2x

If anyone can help me with this problem i will appreciated ♥

2007-10-14 14:30:09 · 4 answers · asked by HEy 3

like x^3+8? and can you explain how you got it? Is there a specific way for factoring expressions with a cubed exponet?

2007-10-14 14:28:53 · 5 answers · asked by yellowducks 1

(x^2n-3)(x^2n+3)

find the product please

2007-10-14 14:28:36 · 5 answers · asked by Kelly S 1

4(4 - w) = 3(2w + 2)

9(4b - 1) = 2(9b + 3)

2007-10-14 14:23:41 · 7 answers · asked by Anonymous

OK so I have one question for my upcoming math test that is in 48 hours. So I shift into PANIC mode and start stressing and freaking as I have.

MY QUESTION
what is the difference between (-2)^4 -2^4???
[negative two to the fouth power]

i know (-2)^4 equals +16 and -2^4 equals -16
BUT WHY


PLEASE GOD IF YOU KNOW THE DIFFERENCE,
...tell me...
very desparate.
THANK YOU

2007-10-14 14:21:32 · 19 answers · asked by ikb<3 2

Given that y = In ( 1 + 4x / 1 - 4x) and that dy / dx = k / (1 - 16x^2), find the numerical value of k.

Hence, find the equation of normal to the curve at the point where x = 1/5

2007-10-14 14:19:11 · 1 answers · asked by ♪£yricảl♪ 4

2007-10-14 14:16:09 · 3 answers · asked by nita s 1

http://tinypic.com/view.php?pic=2cpyl9v&s=2 (Those are the problems)

http://www.themathlab.com/toolbox/geometry%20stuff/trigratios.htm

1) Use the table of trig. ratios to find the m angle A correct to the nearest degree.

2) Use the table of trig. ratios to find the m angle B correct to the nearest degree.

3) Use the table of trig. ratios to find y correct to the nearest integer.

THANKS FOR ANY HELP!

2007-10-14 14:15:08 · 2 answers · asked by Anonymous

Factorize:
(i) 2x^2-x+1/8
(ii) a^2 + 7xy + 12y^2
(iii) 2x^4 - 7x^3 + 3x^2 + 63x - 45

2007-10-14 13:49:20 · 2 answers · asked by besst_gal 1

How would you find the general term for the linear sequence where a=5 and t8=43.5

2007-10-14 13:45:31 · 1 answers · asked by Anonymous

Can you find a polynomial with integer coefficients with root(3,3) - root(2,5) as root?

By root(x,n), I mean the nth root of x.

2007-10-14 13:44:27 · 1 answers · asked by Brian S 2

Find the vertex either by writing the parabola in standard form or using the vertex formula.

f(x) = x^2-16x +3

2007-10-14 13:33:50 · 5 answers · asked by Anonymous

2007-10-14 13:17:01 · 5 answers · asked by hunedip22 1

2007-10-14 13:16:23 · 9 answers · asked by hunedip22 1

Find the variable and write an equation to model each situation. Then solve.

2 buses leave New York at the same time and travel in opposite directions. One bus averages 55 mph and the other bus averages 45 mph. After how many hours will the buses be 400 apart?






help!

2007-10-14 13:09:55 · 5 answers · asked by robertxlove 3

1 Line L is tangent to the graph of y=x-(x^2/500)
on the graph, L crosses y axis at (0, 20)
point Q is on the both graph of y=x-(x^2/500) and the tangent line L.

(a) Find the x-coordinate of point Q.

(b) Write an equation for line l in slope-intercept form.

(c) Suppose the graph of y=x-(x^2/500) shown in the figure, where x and y are measured in feet, represents a hill.
There is a 50-foot tree growing vertically at the top of the hill. Does a spotlight at point P directed along line l
shine on any part of the tree? Show the work that leads to your conclusion.

**** and would you please be accurate and show details?? cuz i am not smart enough... :((****

2007-10-14 13:03:12 · 2 answers · asked by leonardo 1

An automobile manufacturer can produce up to 300 cars per day. The profit made from the sale of these vehicles can be modeled by the function ... P(x)= -10x^2 + 1700x - 52,000

a) How many cars should be made and sold to maximize profit?

b) What is the maximum profit?

2007-10-14 13:02:17 · 1 answers · asked by Anonymous