Friday

February 12, 2016
Total # Posts: 25,219

**History Help pls**

The pictures I have seen of plantation life show rows of small slave cabins. I have a sneaking suspicion that (A.) s correct but your text book must tell you.
*January 8, 2016*

**History**

Remember all that about 4/5 of a person for each slave?
*January 8, 2016*

**Checked it - ok**

-5 x^2 - 10 x - 5 = y x^2 + 2 x + 1 = -y/5 (x+1)^2 = -(1/5)(y-0) sure enough it works :)
*January 8, 2016*

**math**

k x^2 - 10 x - 5 = y k x^2 - 10 x = y + 5 x^2 -(10/k)x = (1/k)(y+5) x^2 -(10/k) x + 25/k^2 = y/k+ 5/k +(5/k)^2 (x-5/k)^2 = (1/k)(y+5 +25/k) vertex at x = 5/k and y= -5-25/k I want k negative so that the function is negative for large +or - x I want the vertex at y = 0 -5 - 25/...
*January 8, 2016*

**geography tourism maths literacy languages**

When I was a student entering college I wanted to be a Naval Architect. However it was 1955 and physics was really, really exciting. Solid state physics and electronics was just happening and the space program was happening.... so I became a physicist. However I still wanted ...
*January 8, 2016*

**maths**

(x-a)^2 + (y-b)^2 = r^2 (5/2-a)^2 + (1/2-b)^2 = r^2 25/4-5a+a^2+1/4-b+b^2 = r^2 but a^2+b^2 = r^2 for (0,0) so 26/4 -5a - b = 0 5 a + b = 26/4 center lies on 2y=3x or through(a,b) 2 b = 3 a so 26/4 = 5 a + (3/2) a 26 = 20 a + 6 a = 26 a a = 1 b = 3/2 take it from there
*January 8, 2016*

**math**

altitude is max when angle is 90 degrees area = (1/2) base * altitude
*January 8, 2016*

**science and technology**

density of water = 1 gram/cm^3 1. weight in water is 0 2.volume = 100 cm^3 because it displaced 100 grams of water Therefore if neutrally buoyant it weights 100 grams in air. 3. Buoyant force = 100 grams . That was given. 4. volume = 100 cm^2 as we said
*January 8, 2016*

**maths**

sin theta = sqrt(62)/12
*January 8, 2016*

**Physics**

.25(6+14) = 5 5/.02 = 500/2 = 250 N a = F/m = 250 N/.25 = 1000 m/s^2 I get d.
*January 8, 2016*

**Physics**

change in momentum / 0.02
*January 8, 2016*

**physics**

g = v^2/r
*January 8, 2016*

**Geometry**

In other words if I am not carrying an umbrella, it is not raining. The biconditional would be I carry an umbrella if and only if it is raining. However you might carry one even on a sunny day.
*January 7, 2016*

**Geometry**

Right, if the statement is true, the contrapositive is true. statement If a cow, then a mammal converse If a mammal then a cow who knows? Inverse If not a cow, then not a mammal who knows? Contrapositive If not a mammal, then not a cow TRUE
*January 7, 2016*

**math**

http://www.jiskha.com/display.cgi?id=1452214976
*January 7, 2016*

**Physics**

F up m g down F = m a Fup - m g = m a so Fup = m (g+a) = 5.2 (9.81 + 4) Newtons
*January 7, 2016*

**math**

xxxxx xxxxx xxxxx xxxxx 4*5 = 20
*January 7, 2016*

**Math**

If you walk fist to school, then to the shop 3.25 *5280 = 17160 feet 17160 + 900 = 18060 feet or 3.42 miles
*January 7, 2016*

**math and science both**

I do not understand your question.
*January 7, 2016*

**Physics**

F = m a mg - Ffriction = m (3) so F friction = m(g-3) = 39 (7) = 273 Newtons
*January 7, 2016*

**science**

well, you are correct if you say displacement = 0 because vector is from 0 to 0 and distance = 1 mile
*January 7, 2016*

**helpe plese**

Well I suppose because people can plan evil deeds on social media and you can make your plans with others world wide. The practice raises questions of privacy though. I am not sure privacy appears in the first 10 amendments though although there certainly are laws defining and...
*January 7, 2016*

**Math**

maybe something like this. I do not see your picture. d = 3 h 2 d + 2 h = 64 feet 6 h + 2 h = 64 8 h = 64 h = 8 feet d = 3 h = 24 feet = 8 yards
*January 7, 2016*

**Math**

8 feet * 12 = 96 inches so ceiling is 96 + 2 = 98 98 - 64 = ?
*January 7, 2016*

**math**

four dimes = 40
*January 7, 2016*

**Huh**

Please check for typos and if you have presented the entire problem Obviously if you double the mass you double the gravitational force. Now do you maintain the same angle of the circumference to the hand? do you still have 50 N or do you have a new angle and rotational speed?
*January 7, 2016*

**Math**

yes, 77 - 75 = 2
*January 7, 2016*

**Math**

5'11" = 60 + 11 = 71 inches 71 + 6 = 77 inches which is how much longer than his bed?
*January 7, 2016*

**Math**

(14 + 14 + 7 + 7)8
*January 7, 2016*

**Algebra**

So am I. cost = 50 + 170 t where t is the time in hours however you show nothing on the benefit or value side of the equation. Obviously your lowest cost per hour is to use the maximum of four hours, spreading the 50 cleaning fee out over as many hours as possible. However ...
*January 7, 2016*

**math**

2 and 4 maybe ?
*January 7, 2016*

**Physics**

check below :)
*January 7, 2016*

**Physics**

energy in = i^2 R * t i^2 = 12.25 t = 4*60 = 240 seconds so energy in = 2940 R Joules energy to boil = 60 g * 540 cal/g = 32400 calories 32400 calories(.239J/calorie) =7744 Joules so 2940 R = 7744 R = 2.63 Ohms
*January 7, 2016*

**Math**

h = -9 + 16 h = 7
*January 7, 2016*

**Math**

What you typed is 11 h - 25
*January 7, 2016*

**Do you mean 37 and 38 percent maybe?**

This makes no sense as written.
*January 7, 2016*

**History/social studies**

I guess I would ask: "Why did the new US Government decide that it was important to spread west toward the Pacific from the Atlantic Coast? What would the US look like if that had not happened? This might help: http://www.ushistory.org/us/21b.asp
*January 7, 2016*

**math**

18 servings = 4+8+12 = 24 cups so there are (4/3)cups/serving 108 cups (3 servings/4 cups )=81 servings 8 cups oj/12 cups sel = (2/3) oj/sel
*January 7, 2016*

**Maths**

I think that is the height, not the distance, but it does not matter because with 45 degrees they are identical :)
*January 7, 2016*

**Maths**

The hypotenuse is 4 and the angle is 45 degrees? You can do it.
*January 7, 2016*

**Math**

here: http://davidmlane.com/hyperstat/z_table.html
*January 7, 2016*

**math**

4.6 - 3.8 = .8 5.4 - 4.6 = .8 we have a constant slope, straight line with slope of .8/1 = .8 so a - 5, 6, 7, 8, 9, 10 , 11 b - 3.8, 4.6, 5.4, 6.2, 7.0
*January 7, 2016*

**P.E.**

You are welcome :)
*January 7, 2016*

**P.E.**

Well, certainly physical :) http://en.wikipedia.org/wiki/Twerking
*January 7, 2016*

**Math - Ms. Sue, Check!**

Yes, that is the only choice that makes any sense.
*January 7, 2016*

**Math - Ms. Sue, Check!**

That would be 3870.80 though which is not one of the choices so I do not think whoever wrote the question thought that through :)
*January 7, 2016*

**Math - Ms. Sue, Check!**

1.06^3.5 = 1.226 1.226* 3250 = 3985.23
*January 7, 2016*

**Physics**

one revolution is 2 pi radians so one Rev/second = 2 pi radians/second
*January 7, 2016*

**Intro to Chem**

24.3/40.3 = x/12.1 trick question, no need to calculate mols or anything, just proportion.
*January 7, 2016*

**Check My work ( math)**

LOL, you plug the data into the software and ask for correlation coef.
*January 7, 2016*

**Check My work ( math)**

http://www.mathportal.org/calculators/statistics-calculator/correlation-and-regression-calculator.php
*January 7, 2016*

**MATH**

u = 5 c t = time upstream (5-t) = time downstream (u-c)t = 48 (u+c)(5-t) = 10 4 c t = 48 so t = 12/c 6 c (5-t) = 10 6 c (5 - 12/c) = 10 30 c - 72 = 10 30 c = 82 c = 2.7333 u = 5 c = 13 2/3 miles/hour ----------------------------- by the way t = 12/2.73333 = 4.4 hours so 5 - t...
*January 7, 2016*

**History**

..... maybe not to wage it of course :)
*January 7, 2016*

**History**

I am sure Ms. Sue knows much more about this than I. Go with her suggestions.
*January 7, 2016*

**History**

I am not sure about the first but suspect you are correct. Yes on the second. Based on Abe Lincoln's experience with self education, I have to agree with the third, although it was not at all true in Massachusetts where I live.
*January 7, 2016*

**Algebra (Urgent)**

(1-3)/(3-1) = (y-1)/(x-3) -2/2 = -1 so -x+3 = y-1 y = -x + 4
*January 7, 2016*

**Pre- Algebra**

Good.
*January 7, 2016*

**Pre- Algebra**

agree with all 5, well done :)
*January 7, 2016*

**Precalculus**

sin^2 T = 1 - cos^2 T sin^2 T = 1 - 9/49 sin^2 T = 40/49 sin T = (2/7) sqrt 10 and tan T = sin T/cos T
*January 7, 2016*

**Physics**

I do not see any figure. His speed at the top is his horizontal speed, u, for the whole trip u = 28 m/s at takeoff v^2 = Vi^2 + u^2 where v is total speed and Vi is initial speed up so 29.5^2 = 28^2 + Vi^2 Vi = 9.29 m/s that is all I need to do the vertical problem easy with ...
*January 7, 2016*

**nonsense**

If you tried to copy and paste something, that does not work.
*January 7, 2016*

**Math**

1/6 + 1/3 = 1/6 + 2/6 = 3/6 = 1/2 so half are red or blue, leaving half 3/7 * 1/2 = 3/14 are green so (3/14) x = 27 I think you can find x now. 9*14
*January 7, 2016*

**History**

http://www.archives.gov/exhibits/charters/declaration_transcript.html yes
*January 7, 2016*

**History**

wha? I went and read the Declaration anyway. I was right. It is C, the right to a fair trail.
*January 7, 2016*

**History**

The others look good to me, but I am only a physicist.
*January 7, 2016*

**History**

but did anyway: " ..... For depriving us in many cases, of the benefits of Trial by Jury: ......"
*January 7, 2016*

**History**

which of the following BEST explains why americans in the north and east were less supportive of the war of 1812? A.) They relied more on British trade !!!!!!!!!!!!! also I suspect: C.)the right to a fair trial but am not about to go re read the Declaration
*January 7, 2016*

**math**

For heaven's sake I did it for you.
*January 7, 2016*

**math**

(4/3) pi r^3 (4/3) pi (216) 905 m^3
*January 7, 2016*

**Science**

This is causing me great pain.
*January 7, 2016*

**Science**

NO!!! Draw a parallel circuit with a battery and two resistors !!!! Then see what applies to a parallel circuit and NOT to a series circuit !!!!
*January 7, 2016*

**Not cheating-math**

4 pi r^2 with a WHAT of 4 meters? diameter, radius ? 201 if radius 50 if diameter Please proof read before hitting Enter !
*January 7, 2016*

**math**

volume is proportional to length dimension cubed for similar objects in three dimensions. 12/15 = 4/5 4^3/5^3 = 64/125 64/125 * 540 = 276.5 cm^3 well, none of your choices look great but I guess 240
*January 7, 2016*

**can not help anyway**

Do not see any drawing
*January 7, 2016*

**physics!!! Damon?**

I can not do much more velocity=Vn = (Xn - Xn-1)/1 second acceleration = (Vn-Vn-1)/1 second
*January 6, 2016*

**Math**

1/8 = .125 58 m * .125 "/m = 7.25 20 *.125 = 2.5 fits but try bigger 5/16 = .3125 58 * .3125 = 18.1 , longer that paper 3/16 = .1825 .1825 * 58 = 10.87 length fits .1825 * 20 = 3.65 fits easy 1/4 = .25 .25 * 58 = 14.5 too big the biggest that still fits is 3/16
*January 6, 2016*

**Math**

Team 1 across team 2down * 0 1 2 3 4 0 x x x x x 1 x x x x x 2 x x x x x 3 x x x x x 4 * 5 = 20
*January 6, 2016*

**Math**

4 [ 5x - 3 + 4y -2x + 3y ] = 4 [ 3x + 7y - 3 ] = 12 x + 28 y - 12
*January 6, 2016*

**Math**

vertex was at (0,0) now at (-5,-3) (y+3) = (x+5)^2 y + 3 = x^2 + 10 x + 25 y = x^2 + 10 x + 22
*January 6, 2016*

**physics! description explanations**

By the way I am assuming that your curve is continuous and smooth. If there is an instantaneous change in slope (velocity), for example at 1 second, then the acceleration is infinite. a = (V2-V1)/0
*January 6, 2016*

**physics! description explanations**

everything is divided by one second for velocity I take position at n minus position at (n-1) for acceleration I take velocity during n+1 - velocity during n
*January 6, 2016*

**physics! description explanations**

time is ending at t time eg = 1 sec is ending at 1, first second v is average velocity in inteval (final-original) a is acceleration change in speed/1 second CHECK MY WORK ___ v a 1s 00 00 2s 17 10 v=(60-43) a =(v3-0)=10 3s 10 -17 4s 00 -2 5s -2 (2m-66) 6s (2m-68) -58 7s (10-...
*January 6, 2016*

**algebra**

I have no idea how many apples because this is about bananas but if you mean bananas and not apples then: 7 b
*January 6, 2016*

**algebra**

[(11/2) / (-3/2)] * [2/2] = 11/-3 times [-1/-1] = -11/3
*January 6, 2016*

**algebra**

(5/2 +3) / (-5 + 7/2) (5 + 6) / (-10 + 7) 11/-3 = -11/3 You did fine.
*January 6, 2016*

**Math**

every month multiply the price by 1.005 in other words price = 2.44 * 1.005^n where n is the number of months from now in 12 months price = 2.44 * 1.005^12 = 2.44 * 1.061678 = 2,59 then 5 = 2.44 *1.005^n or 2.04918 = 1.005^n tale log base 10 both sides .31158 = n ( .002166) n...
*January 6, 2016*

**Physics**

There do not seem to be any accelerations going on here. First cyclist: how long will he take" outbound: 20 km / 20km/h = 1 h inbound: 20 km / 15 km/hr = (4/3) h total time for C1 = (7/3) hour so Second cyclist must do 2x km at 10 km/hr in (7/3) hr 2 x = 10 km/hr * (7/3) ...
*January 6, 2016*

**science**

normal force on wall = k x = 416 * .054 = 22.5 N max friction force then is 22.5 mu up gravity force down = m g = 1.7 (9.81) = 16.7 N so 22.5 mu = 16.7 mu = .74
*January 6, 2016*

**Physics**

acceleration is rate of change of velocity (not speed) deceleration means negative acceleration I suppose, but a physicist just says negative acceleration. I would not use that word! so let's say I an going east at 10 m/sec if my acceleration is +2 m/s^2 east then in one ...
*January 6, 2016*

**math**

You do not have the data needed to answer that question. All the kids in the world - 10
*January 6, 2016*

**math**

I guess lol
*January 6, 2016*

**math**

I hope so but Anon used a + sign between the 8/7 and the 8/3 so maybe 24/21 + 56/21 = 80/21 I do not know if that ampersand is a plus though
*January 6, 2016*

**what does & mean ?**

I do not get your notation.
*January 6, 2016*

**area perimeter**

to make it easy L + w = 14 l w = 24
*January 6, 2016*

**Health PlZ HELP MEE!!!**

Besides it is really stinky :(
*January 6, 2016*

**Health PlZ HELP MEE!!!**

I also agree.
*January 6, 2016*

**math**

Well, if you have a table with values in two columns choose one column for x values and one for y values then for each pair, go right a distance x and up a distance y from the origin (0,0) and make an X Then connect the spots where you have Xs.
*January 6, 2016*

**maths**

http://www.jiskha.com/display.cgi?id=1452111592
*January 6, 2016*

**maths**

Look below
*January 6, 2016*

**maths**

3/2 = 1.5 1.5 * 10^8 meters/second are you kidding? What is the problem?
*January 6, 2016*