Mathematics - 26 December 2007

If a TV's aspect ratio is 16:9 and I know the diagonal size of the screen, what formula is used to find width & height of the screen?

2007-12-26 14:42:20 · 10 answers · asked by mimajuem 1

a.-2
b. 2
c. 8
d. 1\2


14. Find the slope of a line perpendicular to the line passing through the points (-1,4) and (8,1).
a. -3
b.-1\3
c.1\3
d. 3


Thanks for the help much appreciated will pick a best answer ASAP

2007-12-26 13:32:35 · 7 answers · asked by matterized 1

it is
sqrt[ ((x-a)^2 + b)^2 +cx -d ]

2007-12-26 13:31:58 · 2 answers · asked by Anonymous

Simplify the following: Y + 7 / 3y² + 20y – 7

I was wondering how to simplify the denominator. What method can I use. I definitely can't use cross factorization can I?

2007-12-26 13:10:13 · 12 answers · asked by Jade 2

Which of following is equivalent to [1-cos^2(tada)]/[cos^2(tada)]
1. sec^2(tada)
2. csc^2(tada)-1
3. tan^2(tada)
4. sin^2(tada)
5. -[1/sin^2(tada)]

2007-12-26 13:03:08 · 7 answers · asked by Anonymous

1a) Write a line perpendicular to y=2x-5 that passes through the point (-9,6)

1b)write an equation for the line parallel to y=2x-5 with y intercept 8.

2007-12-26 12:58:34 · 8 answers · asked by Anonymous

What month, day, and year?

2007-12-26 12:57:34 · 4 answers · asked by Anonymous

also:
8cotx=-10
how do i do this?
ive been trying for 20 minutes and nothings working!
thanksss

2007-12-26 12:36:45 · 4 answers · asked by Anonymous

In triangle ABC, AB is the hypotenuse, median AD = 2008, median BE = 2007. Find x where AB = 10 sq. rt. x

2007-12-26 12:33:50 · 2 answers · asked by sitting_ducks 1

the question is the P(black) and P(red).
do you add them to get 1
or do you multiply to get 1/4?

and the other one is P(jack) and P(heart)
do i add to get 16/52
or multiply to get 1/52?

i'm not sure if i'm supposed to only multiply if the question is P(A) AND P(b)
or P(A) OR P(b)

2007-12-26 12:28:15 · 5 answers · asked by christyn a 2

prove the identity

2/1+cosx-Tan^2(x/2)=1

HOw did you do it?

2007-12-26 12:20:20 · 5 answers · asked by green 3

2007-12-26 12:19:05 · 4 answers · asked by Anonymous

prove identity
(1+Tanx)(Tan2x)= 2Tanx/1-Tanx
How is this possible? i tried everything! i have spent two hours trying to figure this one out but i cant!

2007-12-26 12:16:03 · 4 answers · asked by green 3

Note: the term is written as a1, the 1 is small which is below the a.


The first four terms in a sequence, and the rules that define them, are shown below.

a1 = 4

a2 = 2a1 + 3

a3 = 2a2 + 3

a4 = 2a3 + 3


What is the value of a4, the fourth term shown in the sequence above?

A. 25
B. 35
C. 41
D. 53

what does the meaning of the symbol a1?

2007-12-26 12:11:15 · 18 answers · asked by Anonymous

2007-12-26 11:56:31 · 13 answers · asked by x115z 1

4y-10y+y+34= 5y+30-2y

2007-12-26 11:53:35 · 12 answers · asked by MMM Ice Cream 1

When graphing 2 lines on the same graph, which of the following will result in an algebraic solution that is "undefined" or "no solution"?


and...


Is it even possible to find the product B times A?

2007-12-26 11:39:03 · 5 answers · asked by Anonymous

I like 9/16. The sound of it rolling off of my tongue is so soothing.

2007-12-26 11:36:09 · 9 answers · asked by Bill W 【ツ】 6

if you add 3/4 of a number back to the number itself, you get 49. Find the number.

Let _____ = __________________________

Equation: ___________________________

2007-12-26 11:32:32 · 9 answers · asked by Anonymous

would you please explain?

http://img402.imageshack.us/img402/9198/mathgrpahskl6.jpg

2007-12-26 11:28:34 · 4 answers · asked by Anonymous

2007-12-26 11:28:10 · 5 answers · asked by Anonymous

I know this is an easy question but I completely forgot how to find percentages.

2007-12-26 11:19:03 · 13 answers · asked by Anonymous

ok... i am studing for the sat. one of the questions in the sat studyguide is:

which of the following could be the remainders when four consecutive positive integers are each divided by 3?

a) 1,2,3,1
b) 1,2,3,4,
c) 0,1,2,3
d) 0,1,2,0
e) 0,2,3,0

the answer is d. but i don't understand how they got the answer. it explains it but it doesn't make sense to me. please help me.

thank you so very much!

2007-12-26 11:12:23 · 6 answers · asked by Elizabeth 3

Ok... the equation is 4^2b-3=8^1-b

What is the value of b?

-3/7

7/9

9/7

10/7

2007-12-26 10:58:01 · 5 answers · asked by Anonymous

1.One side of a triangle is 5 meters longer than the second side.The third side is four times the length of the second side.If the perimeter of the triangle is 63 meters,how long is the second sides?


2.The sum of two angles in a triangle totals 117 degrees,what is the measure of the third angle?

3.Find the area of a triangle with base 21 inches and height 8 inches.

2007-12-26 10:41:28 · 6 answers · asked by Anonymous

http://i11.tinypic.com/6oax2kp.jpg
how would i go about solving this?

2007-12-26 10:40:31 · 5 answers · asked by Anonymous

bob bought one twin pack of video games for $42. This is $6 less than 2/3 the cost of a triple pack of video games. What is the price of a triple pack of video games.

Let _____ = __________________________
Let _____ = __________________________

Equation: ___________________________



Maria is 240 cm tall. This is 3 cm less than 3 times her height at birth. Find her height at birth.

Let _____ = __________________________
Let _____ = __________________________

Equation: ___________________________

2007-12-26 10:36:17 · 5 answers · asked by Anonymous

Exponential Equations:

(1) If 2^x = 3, find 4^(-x)

(2) If 5^(-x) = 3, find 5^(3x)

2007-12-26 10:20:16 · 4 answers · asked by journey 1

Solve each equation for x.

(1) f(x) = (1/2)^(1 - x) = 4

(2) f(x) = 4^x - 2^x = 0

2007-12-26 10:15:27 · 5 answers · asked by journey 1

its driving me crazy!!! i can only think of 6 of the 7...which one am i forgetting?? I used to know them all.

I
V
X
L
C
M

2007-12-26 10:05:33 · 15 answers · asked by Miss Meg 5