Mathematics - 1 November 2007

2007-11-01 16:08:05 · 5 answers · asked by tomato 1

18+(-3.8x)=7.36+(-1.9x)

2007-11-01 16:03:08 · 2 answers · asked by Anonymous

how would I determine the value of the trig ratios when I'm given the angle in radians ?

a.) cot 0.942
b.)csc 3.3

and how did u plug it into your caculator ?

2007-11-01 16:02:13 · 7 answers · asked by VMars 2

cos(sin^-1(x))


sin(2sin^-1(x))


cos(sin^-1(2x))

2007-11-01 16:00:01 · 1 answers · asked by Anonymous

ok there's a coule=/

1- unscramble "rotbeics"
2- what operation signs must be placed in the blanks to get a result of 5? - "2_4_6_8=5"
3-what is the next number in the sequence? explain.
"1,1,2,3,5,8,13" and who made this sequence so famous?

2007-11-01 15:55:03 · 5 answers · asked by my_only_onee_x3 2

y = x^2 + 2x - 6

2007-11-01 15:52:19 · 3 answers · asked by Juan C 6

the length of the semi-major axis is 6 units, and teh foci are located at (0,2) and (8,2)

2007-11-01 15:52:00 · 2 answers · asked by Ethan 1

Can someone help me change this standard form equation into a slope intercept eqaution???

4x+5y=15

2007-11-01 15:48:03 · 11 answers · asked by Cody L 1

2007-11-01 15:47:36 · 10 answers · asked by julia k 1

1) Factor the following polynomial completely.
4 x^2 - 27 x + 35

2) Factor the following polynomial completely.
8 x^2 - 50 x - 13

3) Factor the following polynomial completely.
9 x^2 - 1

4) Factor the following polynomial completely.
27 x^2 - 363

Any help would be greatly appreciated! Thank you!

2007-11-01 15:41:42 · 6 answers · asked by Brandon M 1

3n-2 7
---------- = ------
5 10

2007-11-01 15:39:43 · 2 answers · asked by Anonymous

1. 5x^2-15=0

2. 5x^2=14+33x

2007-11-01 15:39:16 · 3 answers · asked by Anonymous

a man is walking along a straight road heading north when he spots the top of a tower in the direction NxºE, behind low lying trees. The angle of elevation to the top of the tower is yº. After walking d meters along the road he notices that the tower is now NzºE of the road and that the angle of elevation of the top of the tower is now aº. Let the height of the tower be h meters.

How much further must he walk before the tower is located in an easterly direction?

2007-11-01 15:36:21 · 2 answers · asked by patrickfmcooper 1

Find the Height of the Airplane:

An airplane is spotted by two observers who are 1000 feet apart. As the airplane passes over the line joining them, each observer takes a sighting of the angle of elevation to the plane. One observes 40degrees, other 35degrees. How high is the airplane?

2007-11-01 15:32:00 · 5 answers · asked by Anonymous

If f(x) = 4x - 6, what is f(-3)?

6
-49
-18
-6


If f(x) = 2x and g(x) = x-4, what is the value of f[g(3)]?

-6
-2
0
6
2






--------------------------------------------------------------------------------

If f(x) = 2x + 3 and g(x) = (x - 3)/2, what is the value of f[g(-5)]?

-4
-10
-7
-5



If f(x) = 5x - 7, what is f -1(x)?

f -1(x)= (x+7)/5
f -1(x)=(y-7)/5
f -1(x)=5x - 7
f -1(x)=7x-5

2007-11-01 15:17:46 · 6 answers · asked by Sam o 1

A particular river follows the quadratic curve f(x)=x^2, while a nearby road follow cubic curve g(x)=ax^3+bx^2+cx+d.

There are three bridges on the road and they cross the river at the points (1,1), (0,0) and (1,1). The bridge at (1,1) is at right angles to the river. A dam is located at (1,2). The dam is not on this river. There is a straight spillway from the dam to the nearest point on the river.

a) What are the values of a,b,c,d?

b) What are the distances between teh bridges, as the crow flies?

c) At what angles (give both radians and degrees) do the other two bridges cross the river?

d) Where does teh spillway from the dam intersect the river?

e) A straight road is to be built from the existing road to the dam. Where on the original road should it start to have minimum length?



To anyone who could solve a part or all of this....thank you so much!!

2007-11-01 15:17:07 · 2 answers · asked by wintericefairy 1

Suppose that X is random variable with a mean of 5 and a variance of 9. If y = 2x^2 + 4, find the mean of Y.

I used the equation variance = e(x^2) - [e(x)]^2

9 = mean(y) - 5^2,
34 = mean(y)

The answer in the book is 72. Can somebody help me?

2007-11-01 15:07:47 · 1 answers · asked by peopledude123 1

It is a storage bin. Find the dimension of the largest open-top storage bin with a square base and vertical sides that can be made from 108 ft^2 of sheet steel. It may neglect the thickness of the steel and assume that there is no waste.
This is a calculus problem.

2007-11-01 15:00:35 · 4 answers · asked by Anonymous

Find the intervals on which the function is increasing, decreasing, concave up, concave down, then find any local extreme values, and inflection point and explain.
y=-x^5+(7/3)x^3+5x^2+4x+2
This is a calculus problem.

2007-11-01 14:53:46 · 1 answers · asked by Anonymous

xy' + (1-x)y = e^(2x) / x

and also y' + ytanx = 0

2007-11-01 14:51:51 · 1 answers · asked by mmm 2

gfc of 105, 168, 224
using prime factorization

plz help thx

2007-11-01 14:48:55 · 7 answers · asked by jacqueline m 1

Given a set of data
example: x = [a b c d e f] & y = [g h i j k l]
a question reads: find the most accurate approximation of dy/dx evaluated at x = a or b or c or d or e or f
how do you know to use the backwards or forwards differentiation formula. ( I think it has to do with where your asked to take the derivative) Please help!

2007-11-01 14:45:34 · 1 answers · asked by Anonymous

2007-11-01 14:45:08 · 16 answers · asked by jaburt22@sbcglobal.net 1

a-75,99
b-76,85
c-56,91
d-57,132

which is relatively prime plllllz thx

2007-11-01 14:44:51 · 3 answers · asked by Anonymous

find the area of the region which is inside the polar curve r=6cos(theta) and the outside polar curve is r=4-2cos(theta).
what is the area?

2007-11-01 14:42:14 · 3 answers · asked by vntraderus88 1

by the ways, the numbers are small numbers on the bottom .
CuSO4H4-----H20+CuSo4

2007-11-01 14:40:19 · 2 answers · asked by Michelle S 2

how do we know? how can we tell?

2007-11-01 14:40:08 · 2 answers · asked by Laivwudbbetorw/omwuah 1

whats 1+1 equal... dont worry i know the answer this is just a test for something

2007-11-01 14:35:01 · 8 answers · asked by John P 2

today in my algebra class my teacher was going over the pythagoreum theorum and gave us a few problems to work on ind i saw this. Side A=6 times 2 squared Side B=6 Side C=X
Solve for x. when we went over the problem he used the term radical to explain the way to find side A and said it was something to with 6 radical 2 what in the world is a radical or did i mishear what he said? is it not even a square root or anything to do with squares? i dont know step by step instructions would help but links are also welcome

2007-11-01 14:34:34 · 6 answers · asked by Levi 2

Its part of a take home test and i need help!
How do you solve:

5x+2/x^2-4= -5x/2-x + 2/x+2

2007-11-01 14:31:42 · 6 answers · asked by Anonymous