Science & Mathematics - 13 November 2006

If Perimeter is 80 what would be the area

2006-11-13 10:12:32 · 7 answers · asked by blondi709 1 in Mathematics

Define a variable and translate each sentence into an equation or inequality. Then solve.
8) The bill for labor at $13 per hour was at leastt $52.
9) The quotient when dividing by -3 is greater than 5.
10) The 10-km race time of 88 minutes was twice as long as the winner's time.
11) A savings account increased by $50 is now more than $400.
12) Seven times a number is less than 84.\
13) The house sold for $85,000. This is at least four times the original purchase price.
15) b+9< or equal to 16
Define a variable and write an equation or inequality. Then solve.
18) Brisa delivers pizza for Mama's Pizzeria. Her average tip is $1.50 for each pizza that she delivers. How many pizzas must she deliver to earn at least $20 in tips?
a. What is being asked?
b. What does the phrase at least $20 mean?\
c. Write an equation or inequality that describes the problem. Solve.
d. Can your answer be anything other than a whole number? explain.
a. What is being asked

2006-11-13 10:09:37 · 3 answers · asked by C.J. W 3 in Mathematics

2006-11-13 10:08:59 · 6 answers · asked by jennifer_jackson14 1 in Mathematics

2006-11-13 10:01:44 · 13 answers · asked by justgood123 1 in Mathematics

Math adding and subtracting fractions

2006-11-13 09:59:29 · 5 answers · asked by Anonymous in Mathematics

2006-11-13 09:55:57 · 8 answers · asked by tatiana_dreaming12 1 in Biology

2006-11-13 09:54:26 · 7 answers · asked by Anonymous in Zoology

2006-11-13 09:54:24 · 28 answers · asked by happy fishing 1 in Mathematics

2006-11-13 09:54:19 · 12 answers · asked by craftsman 1 in Physics

Slove for the equation for y

6x-3(y-1)=4x+8

2006-11-13 09:54:10 · 5 answers · asked by .::Princess::. 1 in Mathematics

1. A 900-N crate rests on the floor. How much work is required to move it at constant speed (a) 4.0 m along the floor against a friction force of 180 N, and (b) 4.0 m vertically?


2. A car does 7.0 x 10^4 J of work in traveling 2.8 km at constant speed. What was the average force of friction (from all sources) acting on the car?

3. A hammerhead with a mass of 2.0 kg is allowed to fall onto a nail from a height of 0.50 m . What is the maximum amount of work it could do on the nail? Why do people not just "let it fall" but add their own force to the hammer as is falls?

4. In pedaling a bicycle, a particular cyclist exerts a downward force of 90 N during each stroke. If the diameter of the circle traced by each pedial is 36 cm, calculate how much work is done in each stroke.


Please help me do and understand these problems.. Any help is appreciated. Also, show your work so that I can understand what you are doing. Thanks a whole bunch!

2006-11-13 09:53:47 · 5 answers · asked by hdwong58 3 in Physics

All I mean is, do you think this is a waste of time or a valid concern.

2006-11-13 09:53:35 · 10 answers · asked by scouser 2 2 in Astronomy & Space

2006-11-13 09:52:50 · 6 answers · asked by pamela 1 in Mathematics

Slove the equation for y

1/2(y+5)+6x=4x

2006-11-13 09:52:29 · 5 answers · asked by .::Princess::. 1 in Mathematics

Solve the equation for the y

1/2y-7=-3x

2006-11-13 09:51:26 · 2 answers · asked by .::Princess::. 1 in Mathematics

Two men are playing Russian roulette using a pistol with six chambers. Assuming that a single bullet is used and that the cylinder is spun after each turn, what is the probability that the 1'st man will lose the game?

2006-11-13 09:50:54 · 5 answers · asked by Anonymous in Mathematics

Slove the equation for y.

2-y/6=8x

2006-11-13 09:49:56 · 4 answers · asked by .::Princess::. 1 in Mathematics

2006-11-13 09:48:12 · 4 answers · asked by Anonymous in Astronomy & Space

If they abducted people in years past and studied their sexual organs, as so many people have claimed, isn't it possible that they got enough generative material to create a whole race of humans somewhere else? is that not scary or what?

2006-11-13 09:46:15 · 11 answers · asked by niko 3 in Astronomy & Space

2006-11-13 09:44:59 · 5 answers · asked by mstrey12 2 in Geography

hereditary.
heterozygous.
homozygous.
a mutation.

.




Which of the following is a vestigial structure?

the human tailbone
the bill of a finch
flower color
fossil cast

2006-11-13 09:44:30 · 10 answers · asked by Anonymous in Biology

2006-11-13 09:44:28 · 3 answers · asked by geoff l 1 in Mathematics

The allele for a cleft chin ,C, is dominant among humans. What are the results of a cross between parents with genotypes Cc and cc?

this question is from my friend. im trying to help her, but i don't seem to get it.

2006-11-13 09:43:49 · 4 answers · asked by Anonymous in Biology

I'm slowly starting to understand 3d vectors. I hope someone can explain further.

I'm trying to calculate the angles between 8 lines in 3D space. I have the start and end point of each line as a 3d vector. A previous suggestion was:

"You first need to write each one as a unit vector, which means dividing all of the values through by a value so that the magnitude will be 1. For each of these vectors, this means dividing by the length of the vector."

That makes sense, I think. Can someone check my sums to be sure I'm doing it

For example, here is the first set of points:

From: 0.0548981, -0.0473777, -0.12331
To: 0.0595451, -0.0757554, -0.055356

So...
Endpoint minus start point:
0.0595451, -0.0757554, -0.055356

Gives vector length 0.073787767

So the unit vector is:
0.062977919, -0.384585428, 0.92093856

Is that correct?

Where do I go from here?

2006-11-13 09:40:47 · 3 answers · asked by Song2 2 in Mathematics

2006-11-13 09:40:34 · 3 answers · asked by Anonymous in Mathematics

When the bleachers at a high school basketball game were filled to capacity, they held 319 people. Assuming that each row contained the same number of people, how many rows were there?

2006-11-13 09:37:38 · 8 answers · asked by Anonymous in Mathematics

7 letters

2006-11-13 09:36:59 · 5 answers · asked by Anonymous in Weather

2006-11-13 09:36:05 · 2 answers · asked by tom_1106 1 in Engineering

2006-11-13 09:33:37 · 7 answers · asked by Anonymous in Other - Science

2006-11-13 09:33:09 · 3 answers · asked by tima 1 in Mathematics