Mathematics - 22 September 2007

Like i said i dont know how to remove brackets. I took a fare shot and tryed on this problem: 2[3z-5(2z-3)] = 3z -4 How do i got about solving this. Like how do i handle those brackets i thought they were like parenthesis but thy are not i guess i keep on getting -10z = -21. so i guess im not handling the brackets right. Help please....

2007-09-22 06:25:56 · 8 answers · asked by Luvon 3

Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the number of cars driven on 1st Avenue can be modeled by an exponential function, C= p * a^t where p is the number of cars on the road on the first day recorded. If you commuted to work each day along 1st Avenue, would you prefer that the value of be between 0 and 1 or larger than 1? Explain your reasoning.

2007-09-22 06:25:36 · 5 answers · asked by darrington2001 1

help

2007-09-22 06:11:28 · 11 answers · asked by Anonymous

can anyone please tell me how the x is found in details? thanks in advance.

i) sin 4x = 0 (0 to 2pi interval)
x = 0, pi/4, pi/2, 3pi/4, 1pi

ii) cos (-2x) = 1 (0 to 2pi interval)
x = 0, 1pi

2007-09-22 06:02:10 · 3 answers · asked by arcaniz 2

x^-4 + 8x^-2 +15 = 0

2007-09-22 05:54:57 · 6 answers · asked by Anonymous

2007-09-22 05:51:16 · 10 answers · asked by Anonymous

2007-09-22 05:47:12 · 17 answers · asked by michael b 1

1. Find h(k(x)) and k(h(x))
h(x) = 1/2(3x+5)
k(x) = (2x-5) /3x

2. The state the relationship between h and k

2007-09-22 05:40:58 · 2 answers · asked by Anonymous

x / (x-2) - 2 / (x^2 +2x -8) = 5 / (x+4)

2007-09-22 05:37:06 · 5 answers · asked by Anonymous

Let see how good ya'll answer these and must show your work.

3.0(-2.57)=

-17+ x=13.3

1/2 + x=12

1/11a = 0

n/5 = 14

7/3 - x/3 = x/4

8p=5(2p+3)

2007-09-22 05:30:41 · 5 answers · asked by Mr. Vitamin C 4

Thanks everyone for answering my questions. I don't understand how to multiply fractions.

2007-09-22 05:27:34 · 13 answers · asked by Anonymous

If "a" pens cost "b" dollars, how many dollars would "c" pens cost at the same rate?

ab/c
a/bc
b/ac
bc/a
c/ab

2007-09-22 05:25:36 · 11 answers · asked by Anonymous

Sue and Fred have a combined age of 42 years. If Sue's age is 1/2 of Fred's, how old is Fred in years?

16
20
23
28
35

2007-09-22 05:23:34 · 6 answers · asked by Anonymous

(1+4x+3x^2); (8x^3-1); (4x^2+2x+1); ( x^3+x^2-4x-4); (2x^2-3x-2); (4x^3-3x^2-4x+3); (4x^2+3-3); (x^2+2x-3); (6-x-x^2); (4x^2+x-3); (x^3+3x^2+3x+2); (x^3-1)

thanx

2007-09-22 05:16:53 · 3 answers · asked by Stolen 3

A cable company is asked to provide service to a customer whose house is located 2 miles from the road along which the cable is buried. The nearest connection box for the cable is located 5 miles down the road. Installation cost is 2.1 cents per foot along the road and 3.5 cents per foot off the road. Describe at what point the cable installation turns off the road AND what the minimum cost for the installation will be.

2007-09-22 05:11:57 · 4 answers · asked by Hamza 1

Leon drove 270 miles to the lodge in the same time Pat drove 330 to the lodge. If Pat drove 10 miles per hour faster than Leon, then how fast did each of them drive?

2007-09-22 05:11:46 · 4 answers · asked by plplz 1

0. can anyone help me solve this problem; Sound travels approximately at a rate of 1.50x10(-3 subscript) meters per second through water. Determine this rate in miles per hour.

can sumone please show me step by step.

2007-09-22 05:11:05 · 2 answers · asked by Anonymous

(Jim is able to sell a hand-carved statue for $670 which was a 35% profit over his cost. How much did the statue originally cost him?) I dont need the answer to it...I just want the formula to figure out a problem like this.

2007-09-22 05:09:42 · 7 answers · asked by Anonymous

2007-09-22 05:06:45 · 4 answers · asked by Anonymous

Steven stopped for a drink of water when he had completed 60 percent of a jog. At that point, he had jogged 3 miles. What is the total distance he jogged 3 miles. What is the total distance he jogged?

(A) 2 miles
(B) 3 miles
(C) 4 miles
(D) 5 miles

If you know the answer, please include a brief explanation too! Thank you! I appreciate it. =]

2007-09-22 04:55:53 · 6 answers · asked by H.J. 3

A particle moves in such a way that
x(t)= 1/3t^3-3t^2+8t is the position of the particle when t is greater than 0.

when t=3, what is the total distance the particle has traveled? include turning point and correct total distance!
ahh this is a 1973 Free Response AP CAlculus ab question and i have no clue how to solve it!!!!!!!! please help soon! :)

2007-09-22 04:51:01 · 2 answers · asked by Anonymous

2007-09-22 04:08:27 · 4 answers · asked by sheilacabrera67 1

measurment be on his model? PLEASE HELP :(. Just tell me how to do it. MY math teacher says to do 2/8=x/28 as a proportaion but I dont know how :( Please help :)

2007-09-22 04:05:06 · 4 answers · asked by Anonymous

2007-09-22 04:03:58 · 28 answers · asked by Anonymous

answer: - sqrt6/4 + sqrt2/4 + 1/2
How do I get to there? I have never rationalized with 3 numbers before and I tried doing it by multiplying both sides to get rid of the square root but I just end up with a new problem all over again! I feel so limited just to one formula.. problem is that hteres the xtra variable. I duno how to get rid of the one, I tried doing like 1/1 + 1/sqrt2 + 1/sqrt3 and try to cancel sqrt invididually but that didnt seem to work either... iduno.. maybe I am just dumb at this

2007-09-22 03:58:13 · 5 answers · asked by Tanja 2

i have no idea how you would solve this so can some one please show me the steps to solve it??? please thanks!!

2007-09-22 03:58:08 · 2 answers · asked by Anonymous

2007-09-22 03:37:34 · 12 answers · asked by Anonymous

120/56 = 105/x
please explain the formula to figure this out.

2007-09-22 03:12:25 · 12 answers · asked by Anonymous

8t^4 +10t^3 - 13t^2 +13t -1
---------------------------------------
2t-1

2007-09-22 03:11:04 · 3 answers · asked by Anonymous

2007-09-22 03:04:58 · 3 answers · asked by selenga 2