Mathematics - 6 November 2007

I stink at math and need to compare tree sizes, help appreciated, Thanks :)

2007-11-06 12:56:42 · 6 answers · asked by notAminiVANmama 6

A small island is 2 miles from the nearest point P on the straight shoreline of a large lake. If Alice, who is on the island, can row 3 mph and walk 4 mph, how far down the shore from P should she land the boat in order to arrive at a town 10 miles down the shore from P in the least amount of time. Show your work.

2007-11-06 12:41:23 · 1 answers · asked by RedBirdNation 2

what is a common factor

2007-11-06 12:40:59 · 7 answers · asked by Madeline S 1

1.A truck traveling at a constant rate of 45 miles per hour leaves Middletown. One hour later a car traveling at a constant rate of 60 miles per hour also leaves Middletown traveling in the same direction on the same highway. How long will it take for the car to catch up to the truck, if both vehicles continue in the same direction on the highway?

2.Ben had twice as many nickels as dimes. Altogether, Ben had $4.20. How many nickels and how many dimes did Ben have?

3.Vincent has cut three pieces of rope to complete a science project. Two pieces are of equal length. The third piece is one-quarter the length of each of the others. He cut the three pieces from a rope 54 meters long without any rope left over. Find the number of meters in each piece.

2007-11-06 12:36:24 · 7 answers · asked by katiekcat5 3

how do you figure out of this is a parallel line
in y=mx+b form

-4 = y + 2x
6x + 3y = 4

thank you!

2007-11-06 12:36:03 · 4 answers · asked by Anonymous

Evaluate the expression.

7 tan 360° + 6 csc 270°

2007-11-06 12:32:04 · 2 answers · asked by Brick Top 1

find all of the critical numbers for f(x)=(x+7)^2/3 - 2x^2/3 . determine the intervals whee f is increasing and those where it is decreasing . determine all local extrema.

2007-11-06 12:31:55 · 4 answers · asked by Talal B 1

Here is the question (it deals with maximizing revenue):

According to Mr. Hass, the number of cell phone subscribers in North America was 150 million as of the year 2000 and he claims that the number of subscribers has been increasing at a rate of 42 million per year. He also claims the average annual revenue (to cell phone service providers) per subscriber was $330 in 2000 , but has been decreasing at a continuous rate of 5% per year since then. If this is all true, determine the year when cell phone revenue is expected to peak.

2007-11-06 12:23:40 · 1 answers · asked by Dirk M 2

Use the properties of angle measures to find the measure of each marked angle.

Find the measure of the marked angles.

a = (4x + 6)°
b = (3x + 24)°

Sorry, I don't have a picture, but the angles are directly across from each other.

2007-11-06 12:19:56 · 6 answers · asked by Brick Top 1

The height y (in feet) of a ball thrown by a child is y = -1/14x^2 + 4x + 5 where x is the horizonal distance in feet from the point at which the ball is thrown.
1.) What is the maximum height of the ball?
2.) How far from the child does the ball strike the ground?

2007-11-06 12:18:35 · 4 answers · asked by Anonymous

This is a problem that I need help with. I know how to do it but the problem is that I have to solve this problem without a calculator.

There is a boy who is standing at the center of a circular field that had a radius of 135 feet. He walks due north halfway to the circle. He then turns and walks due east half way to the circle. He turns again and walks due south half way to the circle. Finally he turns and walks due west half way to the circle. When he stops, how many feet is the boy from the center of the circle? Round the answer to the nearest foot.

2007-11-06 12:17:36 · 2 answers · asked by someone1254 2

2007-11-06 12:14:44 · 3 answers · asked by Ustadji 1

x is 15 more than four times y. How would you write that as an equation?

2007-11-06 12:14:25 · 6 answers · asked by Nikki B 3

Can you please tell me if my answer to this math question is right?

My answer:
8.4 and 8.4 because, when added, they equal 16.8.
Of all the numbers that can be added together to equal 16.8 and then multiplyed together, 8.4 times 8.4 will give the greatest product - 70.56

2007-11-06 12:13:54 · 9 answers · asked by Anonymous

the perimeter of a rectangle is 50feet. Describe the possible lengths of a side if the area of the rectangle is not to exceed 114 sq feet.

Looking for a solution set. The sides in feet are [?,?] or [?,?]

2007-11-06 11:47:17 · 1 answers · asked by Happy Killa Pants 2

Two objects move in the xy -plane. At time t, the position of object A is given by x = 9t - 9, y = -3t - k, and the position of object B is given by x = 7t, y = t2 - 2t - 1.
(a) Find the value of k so that the two objects collide.
k=?
(b) At what point do the objects collide?
x=?
y=?

2007-11-06 11:31:41 · 2 answers · asked by wildcat11 1

2007-11-06 11:20:53 · 18 answers · asked by Anonymous

Apparently you need to let e^x = u
Then solve it as a quadratic using the quadratic formula
But I can't see how!

2007-11-06 11:19:29 · 8 answers · asked by Anonymous

Problem 1:
Orange Thirst is 15% orange juice and Quencho is 5% orange juice. how many liters of each should be mixed together in order to get 100 L of a mixture that is 12% orange juice?

Problem 2: A motorboat took 4 hours to make a trip downstream with a 6-mph current. The return trip against the same current took 5 hours. Find the speed of the boat in still water. (Use distance=rate x time)

Thanks. Don't solve it. Just need the equations. :)

2007-11-06 11:14:10 · 2 answers · asked by cheeseater 2

Equation- PI(r^2)(h)+4/3(PI(r^3)=22
How do I find the radius?

2007-11-06 11:11:27 · 4 answers · asked by b f 1

a biker travels downhill at 12mph, over flat land at 8mph, and uphill at 6mph. The biker rides from town A to town B in four hours. The return trip takes 4 hours 30 minutes. how far is town A from town B?

2007-11-06 11:09:44 · 2 answers · asked by Anonymous

factor if possible if not solve by completing the square.

2007-11-06 11:08:24 · 3 answers · asked by Jay 1

Solve the Compound inequality.

3x + 7 > 10 or - 2x > 4

15 < 5x < 25

-0.3 < 0.2x + 0.5 < 0.9

-3x + 1 < -11 or 5x + 2 < 7

2007-11-06 10:48:58 · 13 answers · asked by Anonymous

Im not sure if you have to use induction or not, but I am pretty sure divisibility is involved.

2007-11-06 10:48:49 · 2 answers · asked by gregie09 1

a toy manufactuarer made 1424 stuffed animals. they made teddy bears, bunnies, and dogs in the ration of 8:5:3. How many of each kind of stuffed animal did they make?

the main library purchased 938 new books. They want to distribute the new books to three of their branch libraries in the ratio of 3:5:6. How many books will be given to each library?

at a nursery, there are 1248 flowers. There are roses, orchids, and carnations in the ratio of 3:4:6. How many of each kind of flower are there?

a painter brought 96 L of paint. He bought blue, green, and yellow paint in the ratio of 4:3:1. How many liters of each color paint did he buy?

2007-11-06 10:43:35 · 3 answers · asked by Anonymous

2.The diameter of a white blood cell is twelve ten-thousandths of a cm. Round the diameter to the nearest thousandths of a cm. b. what is twelve ten thousandths in standard form?
c. Is the digit to th right of the thousandths place less than. greater than, or equal to 5?
3. In the nmber 12,057, which digit has the greater value, the 5 or the 7? Explain

2007-11-06 10:43:20 · 1 answers · asked by rosemariestewart64 1

2007-11-06 10:39:50 · 1 answers · asked by lisa 1

Find the x- and y-intercepts for each equation.

1) y = -2x + 8
x-intercept :____
y-intercept :____

2) 1/2x + y = -2
x-intercept :____
y-intercept :____

3) 5x - 3y = -2
x-intercept :____
y-intercept :____

2007-11-06 10:39:36 · 2 answers · asked by erikjjjacob 1

A farmer has 160 meters of fencing and he wants to build a rectangular enclosure for the chickens, using a hedge as one side of the rectangle. What is the maximum area of such an enclosure?

2007-11-06 10:36:25 · 3 answers · asked by Kerrzy 1

Find the common sulution for each system of equations . Check each solution.


1) 2x + y = 4 2x + 3 = 0 _________
2) 2x + y + 0 x - y = 1 _________
3) 3x + 4y = -11 7x - 5y = 3 _________
4) 2x + y = -1 -2x + y = 3 _________
5) 3x - 5y = 4 4x + 3y = 15________
6) 3x - 2y = 5 -4y + 3y = 1________
7) 3x -4y = 5 5x + 4y = 3 ________
8) 4x = 3y - 10 2y = 22 - 5x________
9) 2x + 6y = 14 3x - 4y = -5________
10) 1/2y = 2 - 2x 6x = y + 1 _________

2007-11-06 10:35:13 · 2 answers · asked by erikjjjacob 1