Mathematics - 16 October 2007

2007-10-16 14:01:49 · 1 answers · asked by veronica c 1

okay...

b=ax solve for x... is it b/a =x? ..that ones the simplest one.. the more comlpexed ones i dont get... like F=mv2/r solve for r i dont really get... can you explain? [[[[ / = over.. not divide.. sorry]]


heres more ?'s

d=rt solve for r

I=Prt solve for P

and

m=x+y/2 solve for y

2007-10-16 13:57:28 · 5 answers · asked by Megan 2

#1) A bus traveling at 30 mi/h left at 11:45 a.m. A car following the bust at 45 mi/h left at noon. When will the car catch up with the bus?
#2) The sum of two consecutive numbers is 118. Fins the two numbers.

2007-10-16 13:53:15 · 5 answers · asked by Anonymous

use the numbers 0-9 so that each row and column =20
diagonals are not included

--- --- 8 4
9 --- --- 4
7 --- 3 ---
--- --- --- ---


which one dosen't belong and WHY...
36, 163, 68, 960, 1661, 62

the fact that 1661 has 4 digits dosen't count

2007-10-16 13:50:34 · 2 answers · asked by ? 1

This is the question:

The sum of three numbers is 137. The second number is 4 more thantwo times the first number. the Third number is 5 less than three times the first number. Find the three numbers.

Thanks

2007-10-16 13:39:53 · 5 answers · asked by booyouwhore 2

Hi,

If anyone can help me understand this question I'd appreciated it. I need to

"Find the simplified exact value of:"

sin^2(-5pi/3)tan^2(pi/6) - cos^2(11pi/6)

Any help would be appreciated, thanks!

2007-10-16 13:38:33 · 2 answers · asked by Anonymous

Please show me the work THANKS

2007-10-16 13:33:34 · 2 answers · asked by Joeseph 2

A) pascal's triangle
B) fibonacci sequence
C) square numbers
D) triangular numbers.

2007-10-16 13:28:23 · 15 answers · asked by Anonymous

A rectangle has length of 7 centimeters and width 4 centimeters. What fraction of the perimerter, in simplest form, is the width??

2007-10-16 13:26:35 · 2 answers · asked by Anonymous

Suppose that each cell of a certain bacteria culture divides into two cells every 13 minutes. The initial population of the culture is 55 cells.

Find the expression of the population, P(t), after t hours

2007-10-16 13:25:56 · 2 answers · asked by Lauren 1

5x is over x-x2 (the 2 is an exponent)

2007-10-16 13:23:11 · 8 answers · asked by R.K.O.L 2

2007-10-16 13:22:24 · 8 answers · asked by saad1224 1

if two similar parallelograms have areas of 720 square inches and 125 square inches respectively, what is the ratio of two corresponding bases of these parallelograms

2007-10-16 13:20:39 · 2 answers · asked by Anonymous

explain to me how to solve equations with variable on both sides. heres mi problem: 6(f+5) = 2f - 8

2007-10-16 13:19:02 · 9 answers · asked by sweetcandy900025 1

Mona Yahuso earns three times as much as an actuary as she does as a writer. Her total income is $40,000 more than that of her brother. He earns half as much as Mona does as an actuary. What is Mona’s salary as an actuary?

2007-10-16 13:11:11 · 5 answers · asked by xunsunghero 2

I am really struggling with these questions , please show me the complete work for this as I need to find out where I am making sign errors. I get close but can't finish finding a and b and c. I have tried many of these questions , many times and still none work out PLEASE HELP ME!!!!

2007-10-16 12:56:16 · 1 answers · asked by Anonymous

given a -2,1,b2,5,c6,-1 and d4,-7 form a quarrilateral p q r and s are the midpoints of the sides ab, bc, cd, and da respectively . prove that pqrs is a parallelogram

2007-10-16 12:51:12 · 5 answers · asked by Anonymous

this is a sample math problem i had it on a worksheet.

bob has N pecans and D penuts. if you add D+N, how many nuts do you have?


how the **** am i supposed to know?

2007-10-16 12:50:01 · 2 answers · asked by Ally 2

I got this flat wrong on my quiz and obviously need a little more help with it...

lim (sin x) / (3x)
x->infinite

2007-10-16 12:46:10 · 2 answers · asked by iSmile 2

find the one that does not belong....
36, 163, 68, 960, 1661, 62


make a dollar using 50 coins....



What geometrical figure represents a lost parrot?


replace B, E, and H to make true equasion...
BBE
+HE
----------
HEEE

2007-10-16 12:43:32 · 7 answers · asked by ? 1

factor completely

- x^2-y^2
- y^3x-x^3y

- x^2+2xy+y^2

thanks

2007-10-16 12:43:01 · 1 answers · asked by diana f 1

you have 100 meters of fencing material to enclose a rectangular plot.

a) determine the dimensions which maximize the enclosed area.

b) if you double the amount of fencing, what affect does this have on the maximum possible area enclosed? explain.


i have NO earthly idea what this means or is asking. please help me. thank you very much!

2007-10-16 12:42:09 · 4 answers · asked by Elizabeth 3

I am having trouble with complex #'s .

I have three problems.. for one of them I have the answer ; however I don't know how to do the work for any of them.


#1 .
Problem:
(2 - 3i)/(3 + 4i)

Answer: -6/25 - (17/25)i


Problem 2.
Let z = a + bi represent a general complex number. As noted in the lesson, the conjugate of z, abbreviated conj(z) or conj(a + bi) is the complex number a-bi. Also, the modulus of z, modulus(z) is the "size" of z, or SQRT(a^2 + b^2). Which of the following is true for all complex numbers?
Answer Options:

All of the following
z + conj(z) = 2a
z - conj(z) = 2bi
None of the above


Problem # 3:
Which number is the largest?
A3i
B-7
C4
D -2i
E 4 + 4i
F None of the above

I thought it was 4 but I was wrong...

2007-10-16 12:41:42 · 2 answers · asked by Jaz 'ma' Taz 2

show work for best answer

2007-10-16 12:40:19 · 5 answers · asked by skinzfan36 1

If the angles of a triangle are represented by x, (3x+20, and 6x, the triangle must be...

a) isosceles
b)right
c) obtuse
d) acute

please explain


thanks

2007-10-16 12:40:18 · 7 answers · asked by Magnun S 3

Help me do this equation and give me all the steps please!!

2007-10-16 12:38:40 · 6 answers · asked by Joeseph 2

23-7(x+3)+5x=10
show work plz

2007-10-16 12:37:33 · 3 answers · asked by Anonymous

Is there a formula or something that could take a box and whisker plot and turn it into a set of numbers? For example a minimum of 142 and a maximum of 169 and the quartiles being Q1=145, Q2=146.5, Q3=154.5 into 12 numbers. Or any formulas in Microsoft Excel 2007 would help too. Thanks

2007-10-16 12:35:43 · 1 answers · asked by bd8494 2

If 2 angles of a triagle each measures 70 te triangle is described as...

a) scalene
b) obtuse
c) isosceles
d) right

2007-10-16 12:32:14 · 12 answers · asked by Magnun S 3

Hey I'm studying for PSAT's from the Princeton Review book and this question has really got me?

Michelle rode her bicycle from her house to school at an average speed of 8 miles per hour. Later that day, she rode from school back home along the same route at an average speed of 12 miles per hour. If the round trip took her 1 hour, how many miles long is the round trip?

The answer is 9 and 3/5 or 48/5 but can you tell me how to get it?

2007-10-16 12:29:42 · 2 answers · asked by luckee137 2