Mathematics - 10 June 2007

For example 22? or 17?

2007-06-10 06:38:09 · 1 answers · asked by reeferbliss 1

2007-06-10 06:36:25 · 2 answers · asked by Anonymous

complete the square

1/8d² -1= -5d

would it be like this
7/8d² +5d-1??? how would you continue this?

thanks for your help=)

2007-06-10 06:32:42 · 3 answers · asked by ღßutterflyღ 3

a) for two consecutive whole numbers, the sum of the smaller and twice the larger is 38. Find the numbers.

b) the sum of two numbers is 34. four times the smaller number is 4 less than the larger number. what are the numbers?

c) a lion's top speed is twice the top speed of an elephant. the sum of the top speeds is 120km/h. Find the top speed of each animal.

2007-06-10 06:26:35 · 12 answers · asked by lost_soul 1

Solve the following for the principal values of the indicated variable. By the way these are 3 different problems

2007-06-10 06:24:07 · 2 answers · asked by wetabell08 1

A family spends 20% of its monthly income on food, 23% on rent, and 42% on other expenses and saves the balance. If the family saves $360 per month, what is its monthly income?

2007-06-10 06:23:06 · 8 answers · asked by Lee H 1

A bell rings every 2 hours, a second bell rings every 3 hours, and a third bell rings every 4 hours. If all 3 bells ring at 9:00 AM. , at what time will all 3 bells next ring?

2007-06-10 06:14:56 · 6 answers · asked by Lee H 1

If a can begins empty, sitting at rest in a sea of pressurized air and the valve is opened, then what would happen to the can?
Wil the can move to the left, right, or not move once the valve is opened and air is let inside

Make the following assumptions: Pressure outside can = P ; mass of can = m; Area of can ends(each) = A; area of valve hole = s.

Newton's second law :

m*a = P*s*e^(-bt) - C*v(t)

a = d^2x / dt

v = dx / dt

m*d^2x / dt = P*s*e^(-bt) - C*dx / dt

m*d^2x / dt + C*dx / dt = P*s*e^(-bt) >>> Differential equation

the solution for this differential eq is:
y’ = Ps/(mb-c) { e^ (- c/m * t) - e^ (- bt)}

How can i show that (mb-c) and { e^ (- c/m * t) - e^ (- bt)} are both positive?
granted, that we say positive=the right direction

2007-06-10 06:12:18 · 4 answers · asked by Candy Cane 1

a student has made scores f 83, 72, and 78 on three quizzes. what is the least score the student must make on a fourth quiz to ensure an average of 80?

2007-06-10 06:11:52 · 20 answers · asked by ashley t 2

Hello, wondering if these are correct:

1. log(sub)2 (x+1) - log(sub)2 x = 3
2^log2 (x+1) - 2^log2x = 2^3
(x+1) - x = 8
0 = 7

No solution ?

2. log(sub)4 (x+2) - log(sub)4 (x-3) = 2
4^log4(x+2) - 4^log4(x-3) = 4^2
(x+2) - (x-3) = 16
5 = 16

No solution?

2007-06-10 06:10:19 · 4 answers · asked by jill b 1

A basketball team has won 50 games of 75 played. The team still has 45 games to play. How many of the remaining games must the team win in order to win 60% of all games played during the season?

2007-06-10 05:57:14 · 8 answers · asked by Lee H 1

Clem started biking at 18 km/h at 9:00 Helena started biking 30 min. later at 20/h in the same direction.

a) at what time did helena overtake Clem?
b) how long had each biker been on the road when Helena overtook Clem?

2007-06-10 05:57:06 · 5 answers · asked by sweet_pomelo 2

2007-06-10 05:55:45 · 3 answers · asked by lindasalicea 1

2007-06-10 05:52:44 · 7 answers · asked by lindasalicea 1

2007-06-10 05:51:32 · 6 answers · asked by lindasalicea 1

the copy shop charges a $ 25 processing fee on every printing order as well as $0.10 per page for the first 250 pages and $0.05 for each additional page.

a) write an equation to calculate the cost of any printing job.
b) how much does it cost to print 300 pages?
c) how many pages can be printed for $60

2007-06-10 05:49:18 · 5 answers · asked by Anonymous

A boAt left the dock for Manitou Island at 14:00 travelling at km/h .An hour later ,another boat left the same dock.also for Manitou Island ,travelling at 30 km/h. How long did it take the faster boat to pass the slower one.?

2007-06-10 05:41:20 · 4 answers · asked by mAY 2

(a) y=4x-8 (b) y= -4x+8
(c) y=4x+3 (d) y=1/4x-8

2007-06-10 05:36:30 · 8 answers · asked by lindasalicea 1

2007-06-10 05:32:52 · 5 answers · asked by lindasalicea 1

2007-06-10 05:32:44 · 7 answers · asked by Anonymous

2007-06-10 04:57:14 · 10 answers · asked by ashley t 2

This is a puzzle! Unless you are into this, it should be a neat exercise in internet research. It is being reposted because of questions seeking additional information. All responders to the earlier version were incorrect and ineligible for this one.

Complete Statement of the Problem: A regular convex solid has multiple (flat) faces and 2 inch edges. Five faces meet at each of twelve vertices. Compute the surface Area and Volume and name the solid.

First correct answer for A and V wins. Submit numerical answers to the question. (I can handle up to 12 digits plus a decimal point in the answer.) Don't ask or email me questions. Don't provide information (such as the name of the solid) that can tip off earlier answerers to something they may have missed.

To my knowledge, there is only one solid that meets the criteria. Your first submission is your answer. Emailed submissions disqualify the answerer - keep your answer where everybody can see it.

(More to follow)

2007-06-10 04:51:11 · 3 answers · asked by davec996 4

4y > - 8

3t -4 ≤ 5

2a -5 < 5 - 3a

2 > 3t + 2

3t +2 > 14

2007-06-10 04:46:48 · 7 answers · asked by numbheart_icemaiden 1

find the slope if it exists

2007-06-10 04:33:15 · 6 answers · asked by Anonymous

find the slope and y intercept

2007-06-10 04:00:29 · 5 answers · asked by jay_nikkiyost@sbcglobal.net 2

Hey, this is really puzzling me!!! check out http://web.mat.bham.ac.uk/N.M.Queen/history/hole.html

2007-06-10 03:31:12 · 9 answers · asked by little lady 1

if interest on a credit card is 30.9% and costs £257.78 over 365days what is the credit limit?

2007-06-10 03:00:38 · 1 answers · asked by Anonymous

Don cuts grass for a summer job. He chages $10.00 a job plus $7.50 an hour. Find an equation for the Cost ($) of Don's cutting vs the Time (h). Use your equation to find the cost if the job takes 3 3/8 hours.

Any help is appreciated. Thank-you.

2007-06-10 02:57:25 · 5 answers · asked by Anonymous

2007-06-10 02:49:47 · 17 answers · asked by Anonymous

If a can begins empty, sitting at rest in a sea of pressurized air and the valve is opened, then what would happen to the can?
Wil the canl move to the left, right, or not move once the valve is opened and air is let inside

Make the following assumptions: Pressure outside can = P ; mass of can = m; Area of can ends(each) = A; area of valve hole = s.

Newton's second law :

m*a = P*s*e^(-bt) - C*v(t)

a = d^2x / dt

v = dx / dt

m*d^2x / dt = P*s*e^(-bt) - C*dx / dt

m*d^2x / dt + C*dx / dt = P*s*e^(-bt) >>> Differential equation

the solution for this differential eq is:
y’ = Ps/(mb-c) { e^ (- c/m * t) - e^ (- bt)}

^^ according to this solution, which is velocity, the can will move to the right, but how can i prove that? we need to find something in common between all these relationships that prove it moves to the right.........

2007-06-10 02:32:15 · 3 answers · asked by Candy Cane 1