Mathematics - 14 November 2007

2007-11-14 08:28:58 · 3 answers · asked by bug 2

When I attempt to use linear approximation to solve for sin(47) I get a completely incorrect answer...

Here is what I did

sin(47) ~= sin(45) + cos(45)(47-45)

= (sqrt(2) / 2) + ( sqrt(2) / 2 )*(2)

= (3*sqrt(2)) / 2

= 2.12

Which is totally wrong... what am I missing?

2007-11-14 08:14:17 · 4 answers · asked by Theava 2

These are the 2 problems:
x-5y= -1
-2x+5y=-3

You need to find out the X and Y variables. There was no matrix or determinant, so I'm not sure how to do it. I tried doing it without them, and I got (-20, 1), but those numbers are wrong. If you know how to figure out this problem, please describe how you got it, so I can finish the rest of my homework.

2007-11-14 08:04:29 · 2 answers · asked by M. Rose 2

list answers in ordered pairs

2007-11-14 08:00:06 · 2 answers · asked by jiles357 1

I have to find a general rule that will work for the pattern below:

(4^3) - (2^2)=60
(5^3) - (3^2)=116
(6^3) - (4^2)=200
(7^3) - (5^2)=318
(8^3) - (6^2)=476

i have figured out this bit...

60 116 200 318 476
....56 84 118 158
........28 34 40
..............6 6

but i can't figure out the rule..
please help

2007-11-14 07:57:18 · 2 answers · asked by KY c 1

4 (g-c)/g = g - b(c + 4)

2007-11-14 07:56:16 · 6 answers · asked by rma 1

Here's the question:

f(x)=x^2-5

find (f(x+h)-f(x))/h

I don't understand how to do these complicated ones. The ones we did before were like f(x)=3x+5 find f(-2). Any help would be appreciated! Thanks in advance!

2007-11-14 07:52:29 · 5 answers · asked by Meggie Beth 3

Calculate the given product and express your answer in the form a + bi.

1. (√3/2 + 1/2i)^10

Find the nth roots of the given number in polar form.

2. 81(cos pie/12 + i sin pie/12); n = 4


3. 1 + i ; n = 2

Please show all work and formulas used.

Thank you

2007-11-14 07:52:18 · 2 answers · asked by R.A.P.System 2

Perform the indicated multiplication or division; express your answer in both rectangular form a+bi and polar form r(cosΘ + i sin Θ).

1.

√54(cos 9pie/4 + i sin pie/10)
---------------------------------------------------
√6(cos 7pie/12 + i sin 7pie/12)

Please show all formulas and work.

Thank you.

2007-11-14 07:46:24 · 2 answers · asked by R.A.P.System 2

33 divided by 9871
243 divided by 62932
61 divded by 52821

2007-11-14 07:37:17 · 1 answers · asked by Anonymous

2007-11-14 07:28:00 · 2 answers · asked by kondiii 1

The answers are in the back of the book and it says the answer is 0.071. I just need to know how to get to the answer so i know how to do it on the test. Thanks!

2007-11-14 07:23:08 · 4 answers · asked by Emily S 2

(3x – 2)(x - 4) – (x - 4)(6 – 5x) / (4 – x)(8x – 1)

2007-11-14 06:59:56 · 7 answers · asked by Anonymous

2007-11-14 06:59:10 · 2 answers · asked by Mimer 2

Solve for v.

s = vt + 16t^2
Option 1: v = s – 16t

Option 2:v=s/t -16t^2;t=o

Option 3: v = s/t – 16t; t cannot = 0

Option 4: t/s-16t^2;s-16t^2=0

2007-11-14 06:55:10 · 2 answers · asked by Anonymous

is it possible to teach a gorilla or a dog calculus? or is it just impossible because they don't have the brain capacity?

2007-11-14 06:47:43 · 5 answers · asked by Anonymous

Solve the equation without using logarithms.

1. 4^5x = 16^2x-1


Solve the equation, First express your answer in terms of natural logarithms (For instance, x=(2+ 1n 5) / (1n 3)). Then use a calculator to find an approximation for the answer.

2. 2^x = 3^x-1


3. e^2x = 5

Please show all work and formula used to get this answer.

I Thank You All in advance.

2007-11-14 06:37:49 · 4 answers · asked by Anonymous

2007-11-14 06:33:58 · 2 answers · asked by Anonymous

2007-11-14 06:27:27 · 6 answers · asked by Bnbadangel 1

1.determine K if -3 is root of 2x^2+k x+9=0

2.solve for B. A= 3B/KB+D

I tried looking on various websites but they're confusing.

Please help and explain your steps! Thanks.

2007-11-14 06:25:13 · 5 answers · asked by imok 1

how do you find the domain of a square root

2007-11-14 06:22:51 · 3 answers · asked by Anonymous

http://img149.imageshack.us/my.php?image=44545464864654se5.gif
angle A=60
angle B=53
What is T1 and T2
*use the Law of sines

I nedd T1=x*T2
what is X?

2007-11-14 06:21:47 · 2 answers · asked by Amir B 1

Is it possible to have a triangle with the angle and lengths shown below?

11.6cm
___________________
\ !
\ !
\ !
\ ! 8.7cm
\ !
\ !
15.3cm \ !
\ !

Explain your answer
YES or NO

2007-11-14 06:20:02 · 6 answers · asked by Cavaliers 5

a.) 5a-10b-3ax+6xb
b.) 3x^2-4y+3xy-4x
c.) 21x^2-14x-9x+6

2007-11-14 06:18:51 · 2 answers · asked by ramirez 1

Question
d=.043
scientific notaion=4.3x10^-2
log=4.3e^-2????????

2007-11-14 06:16:30 · 1 answers · asked by B K 1

Find the domain of the given functions (that is, the largest set of real numbers for which the rule produces well-defined real numbers)

43. h(x)= log (-x)

Please show all work and formulas used to find the answer.

I Thank You All In Advance

2007-11-14 06:12:22 · 4 answers · asked by Anonymous

a.) 2x^2-6xy+12xy^2
b.) 3x(a-2b)+(a-2b)
c.) 36ab^2-18ab

2007-11-14 06:11:53 · 4 answers · asked by ramirez 1

Am interested in getting it on-line.

2007-11-14 06:09:56 · 2 answers · asked by stevmg 3

2007-11-14 06:04:14 · 5 answers · asked by R. S 1

Translate the given logarithmic statement into an equivalent exponential statement.

1. log .001 = -3


Translate the given exponential statement into an equivalent logarithmic one.

2. 10^.4771 = 3

2007-11-14 06:04:04 · 5 answers · asked by Anonymous