Answers by visitors named: Jordan

Thank you very much. This is my 2nd day in high school and I'm feeling very frustrated by it all, was feeling like an idiot.

Many, many thanks! Feeling less like an idiot with each question.

ahhhh thank you, thank you, thank you!

East is 090, West is 090 south is 180

A. C = 12.14? B. A = 18.84. 28? C. C = 24868.8?

A. C= 12.56 B. A= 12.56 C. Alright!

Thanks BobPursley!

A Negative Association?

Alright cool.

Im just taking a guess but 2 miles?

Wah, Im sure that was the anwser.

Thanks manny.

3*-7a*-b 3 * -79 = -237 -237 * -3 = 711 Im almost sure it is 711

Thanks James

Yes. 4 6 x8 48

No Actaul. 1,894 + 1,470 = 3364 So the answer would be 330 hundreds

No problem. That's why I'm here.

I think that I a SWAA stands for "it's a small world after all"

thank you so much

It has a seesaw shape, so it is therefore 90,120,and 180 degrees

20=+or-2 sqrt 3=5

What do you mean?

What do youm mean?

By take away the numbers.

thank you ALisha for answering my question. you just did my homework

For that part I thought that the formula would be NiF2.

I HATE CHEMISTRy

Those are all the numbers in the problem. I worked further in the problem and found... (a) 15.9/20.29= 78.54% and for part (b) I found that 20.29g of MgCO3 makes .24mol CO2. So.... Pressure of CO2 = 12.54 atm. Does that seem right?

So that would give you .39 mol. Which would then give you P = 20.77 atm. I see what you are saying about the numbers in this problem. Unfortunately my teachers often gives problems that seem to have something missing, and I don't know what to do about it. I was also wondering if you could explain to me why you said I should use the 15.9g MgO to find mol CO2. That is what I originally thought to do, but then I spoke to a tutor who is the one that said to use 20.29g to find moles CO2. Thank you again.

I gave three different answers. Which one looks OK?

That is what I am thinking. Thanks.

When I use the lowest number of digits (i think your talking about .09) I get 4.7atm.

Ok. Thank you.

Ok. I did that and I found that Q= 1.64 x 10 ^ -18. I then divided that by 1.6 x 10 ^ -19. The answer I got was 10.23. I am being told that is the wrong answer. Could you please double check that for me? Thank you!!

I submitted it online and I was told it was wrong. I also tried 10.22 and 10.24 to see if there was a rounding error.

I just realized that the answer had to be 10. Im sorry for any confusion. Thank you for your help though.

THANK YOU!

i don't know how to work it. didn't work out.

its $2166 NOT $166

Thank you so much you are a god.. can you pleas ehelp me wit h the word problem?

Thank you a million Reiny.

Hz = 1/s What would you do to 1/s to get m/s?

(m)/(1/s) would give you (m)*(s/1)=ms, so it can't be D. (m/1)*(1/s) WOULD give you m/s, though, so the answer must be B.

How much lace edging is needed to go around a circular tablecloth with a diameter of 6 ft?

Using the waterways was the easiest way to transport goods in those days, it would also have been quicker than a horse or ox drawn wagon that did not have established roads to go on.

greatest mean would refer to the highest average life of each light bulb, while the greatest median when looking at a 5 year supply is not as relevant, half your light bulbs would have a lifespan below the median and half would have a life span above. Compare this to all light bulbs lasting roughly the same amount of time. What would you choose?

20-2=18 18*7=126 126-12=114 114/2=57 you would have 57 cookies

exactly, say it was a 5 sided dice, each side labeled A-E. P is probability, what is the probability of rolling an A OR an E the shorthand notation being P(AorE) the answer should be given as a decimal, 1 meaning that the outcome is certain to happen, 0 meaning there is no chance of this happening

great thanks a lot, soz bout double post

thank you!

it depends on whether (a t3) is (a*t3) or if it is (a+t3.)if (180s) is one term as well then. your expansions are either for (a*t3)(1) 180s*a*t3 or for (a+t3)(2) (180s*a)+(180s*t3)

ok it can sometimes be easier to put in an equation of sorts. 6,279,000,000=2,556,000,000 * x then we multiply x by 100 to get % making x the %increase then just solve for x so 6,279,000,000/2,556,000,000=x x=2.4566 then multiply by 100 =245.66% now this does sound like a lot but it is perfectly correct seeing that the population has more than doubled. hope this helped

is it 3 * 3/4 + 5 * 1/3? which way have you done?

cooking, measuring flower etc, 3/4 cups, cement mixing need the right ratio of water and sand to cement, i'm sure you can think of one more for yourself

ok well maybe changing them to decimals then adding will count as another way

on a very basic level decimals are just parts of numbers, like fractions of a whole. with each place to the right being 10 times less than what it was previously eg 0.1 is ten times less than 1 and 0.01 is ten times less than 0.1. this also makes 0.01, 100 times less than 1. hope that helped a little but check out the sites above as well.

try an equation with mass considering they tell you he weighs 62kg

i in turn respectfully disagree with Reiny. from 8 people there are 3 spots to fill and as correctly stated there is no ordering, this means that for the first spot there are 8 people to choose from, the second there are 7 people left to choose from and the third spot there are 6 people left to choose from, making the number of unique subcommittees available 8*7*6=336

an easier way to think about it is that you have 6 ways to choose first place and considering that the same person can not get second place you only have 5 to choose from for second place and of course 4 people to choose from for third place. that makes it 6*5*4 possibilities=120 different combinations for 1st,2nd and 3rd

divide through by 6 first 6(x^6+5x^5+6x^4)=0 take out the lowest common factor x^4 6x^4(x^2+5x+6) then factorise the bracket 6x^4.(x+2)(x+3)

i'm not entirely sure what you mean by expanded form for a single number.

when going from seconds to hours, first times by 60 to get to minutes then 60 again for hours, or just multiply by 60*60=360. the most common conversions you will have to do in sciences are from m/s to m/hr and back again. (however km/hr is the more commonly used units) so remember m/s --> m/hr multiply by 360 m/hr ---> m/s divide by 360 when going from m/s --> km/hr we multiply by 3.6 (360/1000) [seconds to hours / metres to kilometres] and the reverse is true for km/hr --> m/s divide by 3.6 hope this helps, i may have just confused you so ask with any questions you have. :)

5 is fine except for the last line "That means your are happy?". 'That means you're happy' is a much better sentence.

you can of course just do it in one step and take out 6x^4 if you are comfortable enough to do that

DrBob222 is perfectly correct although it does say in the question that the same amount of salt is added at both temperatures. when the snow is at -2 degrees the addition of the NaCl lowers the temperature that the snow melts at to somewhere between -2 and -30 degrees. However the same amount of NaCl being added to the snow at -30 degrees does not lower the melting point below -30 degrees, which of course means that the snow will not melt.

i hate to tell you but communism has nothing to do with monarchs, lords and nobles. If unsure with a question like this, probably the best thing to do is a quick search on all your possible answers, this will probably give you the answer you are looking for quicker than waiting for somebody to reply to a post.

linear is a straight line such as y=ax+b while y=ax^2+bx+c is non linear. a function is defined as each x value giving a unique y value. I'll leave you to take it from here, hope this helped.

well if F=ma and a=v-u/t (final velocity-initial velocity/time) so combining these two equations we get F=m(v-u/t) which gives us F=mv-mu/t if the car is to stop then obviously the final velocity is zero (now this will give us a negative answer but that is OK because it is a retarding force) so our equation is F = (0-9000)/5 which = -1800 so therefor that is 1800 Newtons of force required to stop the car from moving. If you have any questions ask away because i know this can get a little confusing.

if something dissociates then that means that it completely dissolves in a solution. so DrBob222 is completely correct as NaCl, MgCl2 and CaCl2 all dissolve. unlike table sugar. check a solubility table if you are ever unsure.

a=(v-u)/t where v=final velocity, u=initial velocity and t= time in seconds initial is 0 m/s go from here yourself :)

see the post above

ok now Force Force = mass*acceleration use the acceleration you calculated in the first question to find the force exerted on the puck

if something works 100% of the time then there would be no errors, human or equipment related

always draw a diagram as a visual aid if you are having problems with a question

i think Gina may mean the factors of a number, like the factors of 12 are 1,2,3,4,6,12 one way is to start at the lowest factor and write down its pair, ie: 1*12, then 2*6 then 3*4, when you get to 4*3 you have started to overlap meaning that you have reached the maximum number of combinations.

we know that the force the table is exerting on the box must be equal to the force that the box is exerting on the table. in reality the 85N of the box is not the force that is being exerted on the table because the 30N on the other end of the rope is acting against the 85N therefor only 55N of force is being exerted on the table. for 90N the force is not -5N because the box is not exerting any force on the table it is 0N that is my understanding of how these questions work, hope it helps :)

12*(-8) is -96 the absolute value just makes this a positive value so the I12(-8)I is 96

in saying first spot, i am not implying an order i am saying that there are 3 spots to fill, which there are. they would not be counted twice as you are lowering the number of available people left to fill a spot each time. since there are no repeats once somebody fills a spot they will not fill another spot in the same committee.

inverse is 1/(8x^2-9) then make this true for x>= 0 tell me what you get

if we have a number that is 21,079,000 and we need to round to the nearest 100,000 then we are looking at this part of the number 21,(079),000. the 21 million has no effect on the rounding, so treat it as rounding 79,000 to the nearest 100,000. if the question was to round 21,979,000 to the nearest 100,000 then it would be 22,000,000. tell me what you get :)

lets start by multiplying out the brackets 8g+416-96=504+6g-84 then combine the like terms 8g+320=420+6g we then group the g's on one side and our numbers on the other 8g-6g=420-320 which leaves us with 2g=100 meaning g=50 hope this helped post back if u got any questions :)

I'll answer 2. to get rid of the y's we make this a simultaneous equation (1)4x-y=-9 (2)3Y-2X=7 the number of y's must be equal so that they will cancel eachother out when we add them together so 3*(1)=12x-3y=-27 then we do (1)+(2) 12x-3y+3y-2x=-27+7 hopefully you will see that the y's cancel eachother out and we are left with 10x=-20 therefor x=-2 if you are unsure with any of the steps feel free to ask :)

whats the expression?

if this is your code Private Function F(x as Int, y As Int, z as Int) If (y = 1) then Return 2 Else Return x * Z - y + F(x-1,y-1, z) End If End Function what is your test data. if you test this code with y=1 then you will get an answer of 2, else Return x * Z - y + F(x-1,y-1, z)

substitute in what you can from the info you are given in this case change 'A' to 'D+E' this gives us D/D+E =0.35 & D+E/E see if you can take it from here

sure would :)

sorry the answer to the original question is 21,100,000. the example i used would be 22,000,000 because this has been rounded to the nearest 100,000 but in doing so we have reached another million, make sense?

i'm guessing Liz meant questions not equations

do you mean the absolute value of -14? if so you are correct

How do i do the difference os quares if y and 9x are different.

judicial, executive(:

Well, does it mean that n has to be the same for both?

density is given by mass/volume so if the density is 1.53 g/L then we rearrange the formula to find the mass which just happens to be 1.53grams due to there only being 1 litre so depending on whether the question is asking for how many moles of NAOH or how many grams of pure NAOH. another way to look at it, is that if the solution is 50% NAOH then the volume of NAOH in the solution has to be 500mL so u can put that into the density equation and use that value it is probably best for you to finish this off yourself, hope it helped :)

I5p+12I = 7 there will most likely be 2 solutions if we treat it as 5p+12= +or-7 then it may be easier to see what is happening (if we get an answer of -7 from the equation, it will be changed back to +7 by the absolute value) so we have 2 equations now (1)5p+12=7 (2)5p+12=-7 (1)5p=-5 p=-1 (2)5p=-19 p=-3.8 unsure with any of the steps just tell me :)

acceleration due to gravity must be factored in as the rocket is traveling upwards. since you have chosen up to be positive acceleration down must be negative, making gravity -9.8m/s the equation is still force=mass x acceleration accept the formula used to calculate acceleration does not factor in gravity, the value calculated will just assume that no other forces are acting on the rocket i know this may not be the best clarification so ask away with any problems :)

the second answer would be -70 technically all square roots have two answers, when you multiply two negative numbers you get a positive number

no i don't think the weight will be increasing after getting rid of the water. work out the molar mass of hydrated magnesium carbonate, then find the ratio of water to the whole thing in regard to molar mass eg M(MgCO3*5H20)= 144 M(5H2O) = 70 ratio = 70/144 = 0.486 this means that 48.6% of that 10grams is water so by multiplying the 10grams by .486 we get the mass of water, then subtract from 10grams to get the mass of magnesium carbonate once the water has been removed the ratio bit may be a bit vague, if it doesn't make sense just say so and I'll try and clear it up

apologies M(MgCO3*5H20) = 154 ratio = 70/154 = 0.4545 so 45.5% is water, same process as above just use this value instead

sorry i'm a bit confused, what are we trying to find?