Friday

September 19, 2014

September 19, 2014

Total # Posts: 26

**Physics**

A 3.5 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 16.9◦ with the horizontal. An average frictional force of 4.1×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.2...
*October 17, 2013*

**Physics**

A 3.5 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 16.9◦ with the horizontal. An average frictional force of 4.1×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.2...
*October 17, 2013*

**Physics**

A 3.5 × 103 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 16.9◦ with the horizontal. An average frictional force of 4.1×103 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4.2...
*October 17, 2013*

**Math**

There are 12 girls and 9 boys in Mrs. Johnson's classroom. She said that if she randomly selects one student from her classroom the probability that it is a boy is 3/4. Which mistake did Mrs. Johnson make? A. She divided the number of girls by the total number of students...
*March 20, 2013*

**Physics**

Two charges are located along the x-axis. One has a charge of 6.3 μC, and the second has a charge of −3.4 μC. If the electrical potential energy associated with the pair of charges is −0.043 J,what is the distance between the charges? The value of the ...
*March 6, 2012*

**math, algebra**

Thanks!
*March 4, 2012*

**math, algebra**

Tina is trying to drop a water balloon from her balcony onto a rectangular raft in the pool below. The pool is 25 feet long and 15 feet wide. The raft is 6 feet long and 2 feet wide. What is the probability that Tina will hit the raft with the water balloon?
*March 4, 2012*

**math**

write a situation thar can be represtented by the algebraic expression $3.50t.
*October 18, 2011*

**Finite Math**

Assume that 3 digits are selected at random from the set {1,3,5,6,7,9} and are arranged in random order. What is the probability that the resulting 3-digit number is less than 700? I know the sample space is P(6,3) but that is all I know. Help!
*February 28, 2009*

**College Math**

Sorry, I meant to say 10 cans NOT 7.
*February 27, 2009*

**College Math**

A cooler contains 7 cans of cola: 6 regular colas and 4 diet colas. If 3 cans of cola are selected at random, what is the probability that 2 cans of regular cola and 1 can of diet cola are selected?
*February 27, 2009*

**math**

Sometimes it helps to right seperate equations for each person's age. a + 5 = Tisha 2a + 3 = Alex 2tisha = Sara I guess you could have that system of equations be your answer, just pick a variable for each person's name. I'm not exactly sure how you would combine ...
*February 23, 2009*

**Math**

Yes, you are correct! :) Post another question if you need any more help. :)
*February 23, 2009*

**You're welcome!**

:)
*February 23, 2009*

**Read this first! I found the formula for circumference.**

The circumference formula is: c = pi times diameter OR c = 2piradius Sorry, I don't know how to make a pi symbol on the keyboard. :) I couldn't find the area formula... but just place 9.3 in where I said radius. Hope I helped! :)
*February 23, 2009*

**math**

I don't remember the equations exactly, but I know there are equations to find that. Just go an a search engine and type in "circumference equation" or "area equation" and you'll find it.
*February 23, 2009*

**circles**

Like I said with awl, I found the circumference forumla, which is: c = pi times diameter OR c = 2 times pi times radius I can't find the area formula. :( Just place in 3 where I said "radius." Hope I helped! :)
*February 23, 2009*

**reading**

Is there something in particular you don't understand? Or a sentence where you have to underline the adjectives? Then I can help you. P.S: Adjectives are describing words. They usually describe nouns, which are objects. For example: The rabbit was fluffy. Fluffy is the ...
*February 23, 2009*

**reading**

Umm... seriously. Tell us what it is, then.
*February 23, 2009*

**Algebra**

Oh, I kind of skimmed what you said and didn't notice the x-y=2... I'm sorry! Thanks so much though! :) P.S: Is the correct answer 375 miles away from the station, meaning x=5 and y=3?
*February 23, 2009*

**Question**

You see, here's what I did. I changed the "t" in the equation that both of you gave me (75t=125(t-2)) to an x so I could use elimination to solve the problem. That made that equation be 125x - 250 = 75x + 75x = 125 y That's where my problem comes along... it ...
*February 23, 2009*

**Algebra**

A train leaves Danville Junction and travels north at a speed of 75 km/h. Two hours later, a second train leaves on a parallel track and travels north at 125 km/h. How far from the station will they meet? I have no idea what the system of equations would be for this problem, ...
*February 23, 2009*

**algebra**

Christie makes a $9.25 purchase at the bookstore with a $20.00 bill. The store has not bills and gives her change in quarters and 50-cent pieces. There are 30 coins in all. How many of each kind are there? Are these the correct equations? x + y = 30 .25x + .5y = 10.75 (that&#...
*February 23, 2009*

**english**

Well, "which I thought had lost" at the end of the sentence should be "which I thought I had lost." Unless that was a typo, I don't see any other things that need to be corrected.
*February 23, 2009*

**Thank you!**

Did you get w = 19 and L = 76? Thanks! :)
*February 23, 2009*

**Algebra**

The perimiter of a lot is 190 meters. The width is one-fourth of the length. Find the dimensions. Here's my system of equations: 2w + 2L = 190 1/4L = w What would I do from here? I prefer the elimination method. Would I multiply the second equation by 4? When I did so, it ...
*February 23, 2009*

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