# Posts by Knights

Total # Posts: 334

**math**

2/3x - 1/4 x = 500 8/12 - 3/12 = 500 5/12 x = 500 x = 1200

*April 13, 2013*

**maths- plseee urgently**

plug in calc to get roughly 0.261496941........

*April 12, 2013*

**Science Check answer**

I tried to use outside sources for my answers but feel free to check on the internet for help.

*April 12, 2013*

**Science Check answer**

1. a 2. you are right 3. correct 4. thermal radiation you are correct 5. Best is Radiation Next is Conduction Last is convection (air) So false 6. An example of potential energy is a ball sitting at the top of a ramp, but not moving. It has potential energy. The same could be ...

*April 12, 2013*

**interpersonal communication**

Is there a question?

*April 12, 2013*

**algebra :( help me!!**

Probably mean because it is the average and thus in total the exact center of each group.

*April 12, 2013*

**Math**

Um...are we given how many shares?

*April 11, 2013*

**Algerba 1**

woops for the first I looked at it wrong... 3 * 10^10 xs 7 x 10^-4 = 21 x 10^6 = 2.1 x 10^7 And ma'm, I believe it is written in scientific notation...

*April 11, 2013*

**Algerba 1**

1. 3 * 10^4 * 7 * 10^-4 7*3 = 21 10^4 * 10^-4 = 10^0 = 1 21 * 1 = 21 2.1 * 10^1 2. (5*10^4)^2= 25 * 10^8 = 2.5 * 10^9

*April 11, 2013*

**science**

Yeah, that is true. But the standard definition for the atomic number is the proton, since electrons can vary. Quote "The atomic number is equal to the number of protons in an atom's nucleus. The atomic number determines which element an atom is." from "...

*April 11, 2013*

**science**

EDIT - Damon is right, for number 4.

*April 11, 2013*

**science**

1. located in electron cloud 2. 8 3. protons 4. True. The closer the atoms are to the nucleus, the more energy it takes to move them between the levels. 5. True

*April 11, 2013*

**math**

a. factor would be if 2x+y * something else but it is not b. this is a factor beause it is 2x+y * something else c. sum of two terms because two terms are added d. yes it is a product because two terms are multiplied

*April 11, 2013*

**math**

a. False b. true c. true d. true

*April 11, 2013*

**math**

If it is 30 feet long, the other side is also 30 feet long. Thus, we have 30/15 + 1 = 16 saplings for one side. This, multiplied by 2 gives us 32 in all without the width. Now we only have 48-32 = 16 saplings left. Each side minus 2. Thus, we have x/2-1 saplings on each side. ...

*April 11, 2013*

**algebra1**

distance = rate times time. Use the formula and plug in the constants and variables.

*April 11, 2013*

**Math**

For average grade of 90, must all add up to the average times the amount of tests. So, 90*5 = 450 x+ 93+ 82+91+88 = 450 x+(82+88) + (91+93) = 450 x + (170 + 184) = 450 x+ 354 = 450 x+4 + (350) = 450 x+4 = 100 x = 96

*April 11, 2013*

**Math Geometery**

No problem :D

*April 11, 2013*

**Math Geometery**

No. Imagine the center of the polygon. It can only have one point where the vertical line of symmetry hits the center of the polygon. So only one.

*April 11, 2013*

**math**

Honestly, it is neither beneficial to any of us for you to continually post so many questions without an explanation of what you need. Anyways, 137 / 6 = firecrackers / duds 137/6 = 2466/x = firecrackers / duds 137/6 = 2466/x cross multiply to get 137x = 2466*6 x = 108 so you ...

*April 11, 2013*

**math**

we get 238 km in 15 days 30 days is 30/15 = 2 times that so must be 2 * 238 = 476

*April 11, 2013*

**math**

answered question please do not double post

*April 11, 2013*

**math**

8A = 7B A + 14 = B 8A = 7(A+14) = 8a = 7A + 7*14 A = 7*14 A = 7*7*2 = 49*2 = 98 mph B = 98+14 = 112

*April 11, 2013*

**math**

1/1/55+1/30 = 1/ (17/330) = 330/17 min

*April 11, 2013*

**chemistry**

1. Usually sulfur smells like rotten eggs, but not the element sulfur, because sulfur is usually associated with hydrogen sulfide, which smells like rotten eggs too. 2. Probably aluminum sulfide if I had no other guess....also because no picture. 3. Perhaps to scrape off the ...

*April 11, 2013*

**math**

3b(5b-8f) = 15b^2 - 24bf

*April 11, 2013*

**math**

a. false b. true c. true d. true

*April 11, 2013*

**History**

Fetterman massacre. In December 1866, the Native American allies attacked and defeated a United States unit in what the whites would call the Fetterman Massacre (or the Battle of the Hundred Slain), which resulted in the most U.S. casualties of any Plains battle up to that point.

*April 5, 2013*

**Maths**

sin 30 = 1/2 thus, we get 3/2 - 2cos 60 cos 60 = 1/2 thus we get 3/2 - 2/2 = 1/2 tan45 = 1 so the equation is just 4cos60 - 2cos60 cos 60 = 1/2, as previously mentioned thus, we get 2 - 1 = 1..... btw...I think you can just plug these functions into your calculator to figure ...

*April 5, 2013*

**maths-**

We are not given any other lengths or angles. It is impossible to determine the area of the triangle. x^2+y^2 = 65 we need to find 2xy

*April 5, 2013*

**algebra 1**

1 hour = 60 minutes 1 minute = 60 seconds so one hour = 3600 seconds this is 3600/8 = 450 times of the given. So in one hour, the car runs 450 * 40 = 18000 feet. 18000 / 5280 = roughly 3.4 miles To the nearest whole number, the car goes at 3 miles per hour.

*April 5, 2013*

**geometry**

We are not given the area, perimeter, or any other info to solve for x....Now if LMNO was a rhombus, that would be different.

*April 5, 2013*

**math**

I agree. Please explain what you came up with and how far you have gotten before posting 10 questions in a row.

*April 5, 2013*

**Maths**

multiply all by abcd to get bcd+acd+abd+abc = abcd.

*April 5, 2013*

**Government senior college ikoyi**

Basically the inradius of the equilateral triangle. The formula for that is inradius * semiperimeter (half the perimeter) = area We know that the formula for calculating the area of a equilateral triangle is s^2 sqrt 3 /4 so we get 100sqrt3 as the area of the equilateral ...

*April 5, 2013*

**Math**

Please explain your logic before posting all the questions.

*April 4, 2013*

**Math**

No you don't. FALSE, you find a common denominator, keep that denominator, and add the numerator.

*April 4, 2013*

**Math**

Could you please stop repeatedly posting a quadrillion questions and perhaps ask why you don't get the problem maybe? Anyway, False because many even numbers are negative.

*April 4, 2013*

**Science**

btw this is from wiki answers

*April 4, 2013*

**Science**

Your body needs oxygen in order to efficiently break down glucose and process it into your cell's primary energy source (ATP). As you do more intense exercise, you need more energy and therefore more oxygen. Your blood carries oxygen from the lungs to your muscles. To keep...

*April 4, 2013*

**math ugh.**

20/20 - 9/20 = 11/20 Then, since the ratio between male and female is 11/20 / 9/20 = 11/20 * 20/9 = 11/9, we can use this to figure the amount of males. multiply by 2160 (number of females) to get 2640.

*April 4, 2013*

**math ugh.**

since 9/20 were female, 11/20 were male 11/9 * 2160 = 2640 males.

*April 4, 2013*

**Math**

6 * 1 1/2 meters of cloth = 6 * 3/2 = 9 meters of cloth. a meter is roughly a yard. so we need about 9 yards. However, a yard is a bit less than a meter, so to make sure, buy 10 yards of cloth.

*April 4, 2013*

**Math**

I believe I answered the question, just find the probability of 7 failures ( a 6/7 chance each time) 3 successes (a 1/7 chance each time) Then multiply.

*April 4, 2013*

**Math**

True....I said that in a previous response.

*April 4, 2013*

**Math**

I answered this kind of question before, so I won't get into detail. Before I showed that subtracting a negative number will move you right. It follows that adding one will move you left. Thus, TRUE.

*April 4, 2013*

**Math**

8x = 2000 x= 250

*April 4, 2013*

**Math**

Whew that is a lot of questions you are posting no offense! 3 4/5 is a mixed number, so we convert to improper fraction by multiplying 5 and 3 and adding 4. so we get 19/4 = 15+4/5 From this we can OBVIOUSLY see that 19/4 (4.75) is less than 15 + other stuff. So, FALSE.

*April 4, 2013*

**art**

emotionalism

*April 4, 2013*

**Math**

False. You only do that in adding fractions. In multiplying, you may cross out fractions, but you do not have to find a common denominator.

*April 4, 2013*

**Math**

That is correct, because in a negative the less large it is (without the negative sign) the smaller, so -1/4 is smaller than -8 if you mark me.

*April 4, 2013*

**Math**

True. In multiplication you don't though.

*April 4, 2013*

**Math**

3/4 of total = 120 therefore, 1/4 took bananas the ones taking bananas are 3 times less than those who took apples. so we get 120/3 = 40 people picking bananas

*April 4, 2013*

**math**

Whoops Ms. Sue is correct, forgot to multiply by two to find the diameter. What i found was the radius

*April 4, 2013*

**math**

Oh, if you meant c is circumference, then good. Basically, 2 pi r = circumeference so, 2 pi r = 44 so, pi r = 22 so r = 22/pi that is your answer, roughly 7. (that is because pi is roughly 22/7, so 22/(22/7) = 7/22 * 22 = 7. But since pi is not exactly 7, it is a bit off, by ...

*April 4, 2013*

**math**

excuse me, but what is c?

*April 4, 2013*

**Math**

Plug the variables in. For 10 repeated independent trials, with constant probability of success 1/7 for all trials, find the probability of exactly 3 successes. Round your answer to four decimal places first find probablility of 3 successes, then find probability of 7 failures.

*April 4, 2013*

**Math**

So since it is traveling 20 mph, but the current is going 8mph, the difference is 12mph that the boat is really traveling. 60mph / 12mph = 60/12 = 5 hours to get up the river.

*April 4, 2013*

**Math**

In mathematics, the additive inverse of a number a is the number that, when added to a, yields zero. So it would be negative a. -from wikipedia So, additive inverse of 7 is -7 this statement is true by definition

*April 4, 2013*

**closure propery**

Closed under multiplication means that any member of the set times any other member of the set (including itself) yields another member of the set. We have the combinations, -1 * 0 = 0 -1 * 1 = -1 -1*-1 = 1 0*0 = 0 0*1 = 0 1*1 = 1 All results are from the set, so it indeed is ...

*April 4, 2013*

**7th Grade Language Arts**

Oh...I see

*April 4, 2013*

**7th Grade Language Arts**

Why?

*April 4, 2013*

**7th Grade Language Arts**

You can thank Ms. Sue too :D

*April 4, 2013*

**7th Grade Language Arts**

Probably not ... counterfeit things are fake replicas of the real thing. its not really copying on a smaller scale, so its computer representation.

*April 4, 2013*

**Math**

False. Let the number being subtracted be x. Let the number subtracting x be y. So we get y-x. But since x is negative, we get double negatives, and thus we move more to the right, more positive.

*April 4, 2013*

**Math**

I agree with Ms. Sue.

*April 4, 2013*

**Math**

Uh...I meant like post another entire question, not like a whole chain of them.

*April 4, 2013*

**Math**

so just like Ms. Sue said, you can you use a proportion. 1/20 would be the people owning at least one bird. So, 1/20 * 500 = 25. We get 25 people who were surveyed and owned at least one bird. Next time just post another question I guess :D

*April 4, 2013*

**Math**

darjeeling tea to the ratio of the entire blend is 5 (in the ratio it is given) / 9 (sum of both teas) = 5/9 so, 5/9 * 90 ounces = 50 ounces thus the answer is 50 ounces. sorry for being unclear

*April 4, 2013*

**Chemistry**

Molar mass of Ar = 39.948 g/mol according to convertunits. com a mole is equal to 6.022 * 10^23 therefore, 5.8 * 10^24 / 6.022 * 10^23 * 39.948 is your weight.

*April 4, 2013*

**Maths**

Woops misread question. It would be 200/4 = 50cm^2

*April 4, 2013*

**Maths**

xy = 200 2x*2y = 4xy 4 * 200 = 800

*April 4, 2013*

**math**

4x^2=32 x^2 = 8 x = sqrt8 x = 2sqrt2 plug back in to get 2sqrt2 squared * 4 = 32 8 * 4 = 32 32 = 32 so correct

*April 4, 2013*

**math**

1/ (1/5+1/7) = 1/ (12/35) = 35/12 hours

*April 4, 2013*

**math**

sir, we are not given how many shirts 5 seamstresses can make in 3 days so therefore it is impossible to determine the problem.

*April 4, 2013*

**math**

45 < 3m 15<m so any number more than 15 will do for the smallest integer, then 16....

*April 4, 2013*

**Analytic Geometry - lengths?**

Square ABCD has sides of length 4, and M is the midpoint of CD . A circle with radius 2 and center intersects a circle with radius 4 and center A at points P and D . What is the distance from P to AD? Please help - I drew the diagram, but looks kinda wierd, and dunno which ...

*April 4, 2013*

**Precalculus with Trigonometry**

Using the law of cosines (and assuming alpha is between b and c), then a^2 = 10^2+16^2-2 * 10*16 * cos 20 a^2 = 356 - 320 * cos 20 Figure out cos 20, we get roughly 0.93969262078 we plug this in to get roughly 55.2983614 for side a. I don't know what else you mean....

*April 4, 2013*

**Trigonometry - Cosine of angle**

thanks a lot Steve!

*April 4, 2013*

**Trigonometry - Cosine of angle**

What is the cosine of the angle between two adjacent faces of a regular tetrahedron? (We define the angle between two intersecting planes as the angle between two intersecting lines, one in each plane, such that each line is perpendicular to the line at which the planes ...

*April 4, 2013*

**Computer Literacy**

Using several synonymous terms in the search

*April 3, 2013*

**Triangle inequality?**

Two altitudes of a triangle have lengths 12 and 14. What is the longest possible length of the third altitude, if it is a positive integer? I tried using the triangle inequality but to no avail...how would I do this?

*April 3, 2013*

**Math**

D is correct 2/15 * 240 = 32

*April 3, 2013*

**Ratio**

uh.....it doesn't matter they look equally good. Usually you would swap it to show one item versus another. For example, it might be sugar in drink to water in drink 1:4. But it would be false to say 4:1. So, it is not really which looks better, but which one is right or not.

*April 3, 2013*

**World History**

I agree......

*April 3, 2013*

**Analytic Geometry - Circles and Areas**

Thanks a lot Steve!!

*April 3, 2013*

**Analytic Geometry - Circles and Areas**

Let R denote the circular region bounded by x^2+y^2 = 36. The lines x=4 and y=3 partition R into four regions R1, R2 ,R3 , and R4. Let [Ri] denote the area of region Ri. If [R1]>[R2]>[R3]>[R4] , then compute [R1]-[R2]-[R3]+[R4]. Could someone help me, I don't ...

*April 3, 2013*

**MATH**

a+r+j = 1925 2a=r j = 2r a = 1/2r 3 1/2r = 1925 7/2 r = 1295 r = 370 j= 370*2 = 740

*March 30, 2013*

**maths**

2/3 + 5/4 = 8/12+15/12 = 23/12

*March 30, 2013*

**math**

yes it is

*March 29, 2013*

**science**

Science provides practical tools for understanding everyday life' Science advances critical thinking, problem solving, and creativity in early learners

*March 29, 2013*

**Circumcenter of Triangle in circle**

Equilateral triangle ABC and a circle with center O are constructed such that BC is a chord of the circle and point A is the circumcenter of BCO in its interior. If the area of circle with center O is 48pi, then what is the area of triangle ABC? How to do this? I don't ...

*March 29, 2013*

**soanish**

b. se le otorgó el Premio Nobel de Literatura (use google translate :P)

*March 29, 2013*

**spanish**

c. Jorge Luis Borges

*March 29, 2013*

**math**

Woops I meant 6

*March 29, 2013*

**math**

hw+hl = 54 5h+4h = 54 h = 9

*March 29, 2013*

**maths**

prove what? that the whole thing equals 0 or something??

*March 29, 2013*

**chemistry**

2.4 x 10^-5 mol^2L^-2 at 25C

*March 29, 2013*