Mathematics - 18 August 2007

if given trigo questionss example : 3 cos x + sin x =1 ..how would we knoe which way to use to solve this?..using normal way?..or using substitution t= tan x/2 or using a cos x + b sin x = c form?

2007-08-18 14:34:04 · 4 answers · asked by b_nice_c88 1

Multiply the complex numbers (3+2i)(3-2i)

2007-08-18 14:11:03 · 9 answers · asked by Anonymous

okay. i have a math test monday and i am reviewing and i came across a question and i am stuck! please help me! i would really appreciate it!

If a garden box is x by x feet and an area in ft^2 is twice the perimeter, what is the value for x that satisfies the requirements?

please explain how to do this math problem! thank you soooooooo much!

2007-08-18 14:08:14 · 4 answers · asked by Anonymous

2007-08-18 14:00:04 · 19 answers · asked by returnofkarlos 2

Solve for x: (2x-7)(x+4)=0

2007-08-18 13:55:48 · 8 answers · asked by Anonymous

f(x) is a function and not a constant. The answer is x^2+1, but I do not know how. The derirative is with respect to x

2007-08-18 13:52:54 · 1 answers · asked by Anonymous

3 (x-2) = -4 (x+8) + 10

2007-08-18 13:52:29 · 9 answers · asked by Anonymous

2007-08-18 13:36:04 · 5 answers · asked by CPUcate 6

Out of a 4 feet by 8 feet sheet I ripped three pieces at 9inches and 1/4 by 8 feet long the price of the sheet was 19.52 .So how many square feet did I use and what is the cost?What's a good formula to use to figure this out?

2007-08-18 13:33:35 · 3 answers · asked by Anonymous

2007-08-18 13:33:06 · 6 answers · asked by CPUcate 6

I need to consider the following mathematical proof is it right ot wrong
let a=b
a squared=ab
a squared + a squared-2ab=ab+a squared-2ab
2(a squared - ab)= a squared - ab
2=1

2007-08-18 13:02:56 · 5 answers · asked by Vijaya T 2

the figure has this points x, y: (-2,0) ; (2,0) ; (2,0)
answer options are:
a) f(x) = x^3 -x^2-2x+2
b) f(x) = 1/4x^3 -1/2x^2-x+2
c) f(x) =1/4 x^3 -1/4x^2+2x+2
d) f(x) = 1/2x^3 -1/2x^2-x+2

2007-08-18 12:56:42 · 2 answers · asked by geo2478 1

Its a measurment of 2/3 of a cup of salt, divided by .25

2007-08-18 12:53:00 · 13 answers · asked by Anonymous

answer options are:
a) 3
b) 4
c) 5
d) 7

2007-08-18 12:46:34 · 4 answers · asked by geo2478 1

Question 4

At a particular place it is known to be sunny on an average of three out of every four days. What is the probability that it is sunny on:
a. 5 consecutive days?


b. Only the first 3 of 5 consecutive days?


c. 3 out of 5 consecutive days?


d. At least 1 but no more than 4 of 5 consecutive days?

2007-08-18 12:36:50 · 4 answers · asked by Allison 1

say the scale in the y axis goes up in 5's e.g (5,10,150 and the scale in the x axis goes up in 1's e.g (1,2,3)
is this ok ?

2007-08-18 12:27:47 · 2 answers · asked by Anonymous

Yes... i'm in 10th grade and i still dont get it.. lol

for example... -3+-4= i think its -7?? but how cud it be addition when u are going bakwards???

please make other examples if u can fur me.. thanks

2007-08-18 12:15:17 · 12 answers · asked by Anonymous

A) (sinx)^-1
B) arcsinx
C) sinx^-1
D) 1/sinx

2007-08-18 12:03:39 · 6 answers · asked by Jan1ce 1

A) cos^2x
B) (cosx)^2
C) cosx^2

2007-08-18 12:02:13 · 3 answers · asked by Jan1ce 1

1.) The total amount of water used to water a lwen on Monday was 14.8 gallons. When the lawn was watered on Thursday, the total amount of water used increased by 1/4 percent. What was the total number of gallons of water used to water the lawn on THURSDAY?
choices are: A) 14.4
B) 14.55
C) 15.05
D) 15.2
I keep getting 18.5

2) 3xy - 1/5 y
What is the value of the expression when x=2/3 and y=35?

2007-08-18 11:55:08 · 13 answers · asked by Isa 1

A rectangle is placed under the parabolic arch given by f(x) = 27 - 3x2 by using a point (x, y) on the parabola, as shown in the figure. Write a formula for the function A(x) that gives the area of the rectangle as a function of the x-coordinate of the point chosen.

2007-08-18 11:49:58 · 3 answers · asked by geo2478 1

Can someone please help me to calculate the value of (πcosecπ/6)/12 please. Thanks. You can giv the answer as a fraction involving pi of thats left.

2007-08-18 11:47:39 · 3 answers · asked by Andre S 1

If the height of a trapezoid is 19.8cm, base2 is 23.3cm, and the area is 375.21cm^2, what is base1?

Also, if the height of a trapezoid is 9cm, base1 is 22cm, and the area is 135cm^2, what is base2?

Thank you.

2007-08-18 11:41:07 · 3 answers · asked by lightz_up 1

a. Find the lowest common denominator (LCD)

3x/x^2+5x-24 , x+1/x^2-12x+27

b. A local bus travels 7 miles per hour slower than the express. The express travels 45 miles in the time it takes the local to travel 38 miles. Find the speed of each bus.

Thanks

2007-08-18 11:37:09 · 6 answers · asked by Anonymous

i can't find the patern....1,3,7,15,31,63,_,_, ....please explain the pattern

2007-08-18 11:29:45 · 9 answers · asked by ashley 1

I'm trying to derive a formula for my calculus class but the algebra has me stuck...I'm trying to solve the equation for x but can't get rid of the xsub1...Im dealing with points in the coordinate plane so I have xsub1 and ysub1 in the equation, here I'll just replace them with h and k, respectively...thanks so much in advance!

x^2 - x - xh = (4(Bk + C) + A)/(4A) - 1/4

2007-08-18 11:22:29 · 4 answers · asked by Anonymous

2007-08-18 10:54:43 · 7 answers · asked by SOfTbAll CHiCky_12 2

quikly Plz

2007-08-18 10:40:54 · 7 answers · asked by SOfTbAll CHiCky_12 2

There are 10 people, 6 of which have brown eyes. What is the chance that if you take 2 people out of that group that NEITHER of them will have brown eyes?

2007-08-18 10:40:04 · 6 answers · asked by Happy 3

The sum of two numbers is 35. Their difference is 11. What are the two numbers?
Solve the system by substitution.
3x – y = –7
x + y = –9
did everything else on homework....just need help with these..

2007-08-18 10:37:23 · 7 answers · asked by Anonymous