Mathematics - 1 September 2007

well here is another trig qustion....i think i have the right equations but not sure....here is the question...

"A small corporation borrowed $775000to expand its product line. Some of the money was borrowed at 8%, some at 9%, and some at 10%. How much was borrowed at each rate if the annual interest was $67000 and the amount borrowed at 8% was four times the amount borrowed at 10%?"

i have 3 equations but i dont think they are right...if they are...i must be messing up with my math...here they are...

x+y+z=775000
.08x+.09y+.1z=67000
.08x=4(.1z)

and yet again:
x=8% money
y=9% money
z=10% money

help agian would be appreciated!

2007-09-01 08:34:37 · 3 answers · asked by Anonymous

Find and interpret the slope of the line through (2,130) and (5,250)

2007-09-01 08:18:11 · 4 answers · asked by Megan C 1

how do you add these: 1 ( 1 over 3) + 1 ( 1 over 2) +
1 ( 2 over 3) ? thank you.

2007-09-01 08:15:27 · 5 answers · asked by RobertH 1

2007-09-01 08:09:38 · 9 answers · asked by Megan C 1

2007-09-01 08:07:06 · 9 answers · asked by Anonymous

1. (x^3-8)/(x-2)

2.solve for z: y^2 +3yz-8z-4x

2007-09-01 08:06:34 · 3 answers · asked by jehu22293 2

2007-09-01 08:02:26 · 2 answers · asked by matt_sorrentino 1

2y''' + 5y'' − 22y' + 15y = 0.

2007-09-01 07:49:30 · 5 answers · asked by Anonymous

2/3*(x-9)=3/4

Could someone please guide me step by step how to solve it.

2007-09-01 07:47:54 · 6 answers · asked by Anonymous

plse show me how to do it

2007-09-01 07:42:35 · 11 answers · asked by Anonymous

I have 5 numbers:

38
80
27
65
96

how do i convert these numbers to percents to make a circle graph?

2007-09-01 07:42:15 · 3 answers · asked by Anonymous

I vaguely remember something about not using The Law of Sines in conjunction with basic trig. For instance, if I have a polygon that I split up into triangles, and I use The Law of Sines to find a side that happens to be the hypotenuse of a right triangle (as in a non-right-triangle that shares a side with the hypotenuse of a right-triangle), will there be an error if I use basic trig to find the other angles, sides, etc. in the right triangle?

Am I just making this up in my head?

Sorry if this sounds confusing...

2007-09-01 07:39:22 · 5 answers · asked by Elk n' Fresh 4

that is pretty much it

2007-09-01 07:25:17 · 11 answers · asked by Anonymous

2007-09-01 07:17:29 · 4 answers · asked by pinkparadiseforever 2

I wish to keep the surface area of the remaining ice cream at a minimum to keep it fresh and keep it from getting gummy. I believe the worst method would be to shave a sliver off the top every time. What method would be the best?

2007-09-01 07:08:38 · 2 answers · asked by Anonymous

2007-09-01 07:07:43 · 5 answers · asked by eazylee369 4

Okay, I know that it's using the cofunction identities and the even/odd identities, but other than that, I'm at a loss. Any help would be GREATLY appreciated and as always, I'll pick a best answer TODAY!

Find the exact value of cos (α + ß) if sin α = 3/5 and sin ß = 5/13, with α in Quadrant II and ß in Quadrant I.

Now I know that that means that the cos of α will be negative and the cos of ß will be positive, and I also know that this involves the cofunction identities somehow, but it's acting for the EXACT value, so I can't use the inverse of the sin values of α and ß. So how would I go about solving this? Thank you so much!!!

P.S. What kind of class (i.e. what year in high school math) would you find this in????

2007-09-01 06:59:23 · 7 answers · asked by Anonymous

Please show how to solve this problem.

If a chicken-and-a-half can lay an egg-and-a-half in a day-and-a-half, how many days will it take three chickens to lay forty-four eggs?

2007-09-01 06:57:56 · 7 answers · asked by Anonymous

On A Cooridinate plane where do it lie
Quadrant 1-4

2007-09-01 06:57:55 · 9 answers · asked by kayla.nichols 1

1. You have some nickels and dimes worth $6.25. You have three times as many nickels as dimes. How many nickels do you have?

2. Mary's age is one third of her dad's age. Seven years ago, her age was one fifth of his. How old are both now?

The next one doesn't seem to make any sense, but here it is...
3. If one machine can sort coins in 15 minutes, and a second machine can sort the same number of coins in 30 minutes, how long would it take both machines working together to do the job?

Please work out the problems instead of just saying the answer. Thanks...

2007-09-01 06:57:44 · 8 answers · asked by matt f 3

What are some less expensive mathematical software that will just act like a graphing calculator and that will be much cheaper than expensive math programs and how much do the coast ?

I asked one question and am very glad demiurge42 answered it and now I am asking a 2nd question.

2007-09-01 06:55:09 · 1 answers · asked by Will 4

example: the cost is $3 per hr. plus $20
c=3*h+20

2007-09-01 06:53:37 · 19 answers · asked by kayla.nichols 1

If so why cant you just say Numbers like 1 ( 98 0s) 7 ?

2007-09-01 06:52:37 · 9 answers · asked by moon 111 2

for example 4/3

2007-09-01 06:50:47 · 4 answers · asked by JulyFire 5

I can't get it...

2x^2 - 5x - 3

2007-09-01 06:47:59 · 7 answers · asked by lost.in.love 4

I'm using the TI-83, There is a botton to square thigns but how do I type in x to a higher power than 2?

2007-09-01 06:37:57 · 3 answers · asked by candiecorn 1

I have 10 in base five what is that when converted to base ten

i fiugre the number should get smaller right (because there are less options in a base 5 world) so how come i keep getting 25 i need some help can someone explain to me

2007-09-01 06:37:42 · 4 answers · asked by Anonymous

how many of each is there ?

2007-09-01 06:37:14 · 3 answers · asked by Abu 1

while mentioning the roots of a number, we write as + or _ . My question is, should we mention + or _ symbol in the previous step also along with the square root symbol.

2007-09-01 06:33:39 · 6 answers · asked by mightystrength 1

circle has an eccentricity 0

2007-09-01 06:33:19 · 2 answers · asked by akash s 1