Monday
February 20, 2017

Posts by Anonymous

Total # Posts: 105,358

Math
Find k so that (x-2) is a factor of x³+kx-4? Kindly help me this one
February 14, 2017

math
A train starting at 11 am travels east at 45 km / hr while another starting at 12 noon from the same point trivels south at 60 km / hr . how fast the train separating at 3 p. m
February 14, 2017

algebra
if you have a 15 ft ladder and angle it 75 degrees how far from the house will the base of the ladder be
February 14, 2017

algebra
if you have a 15 ft ladder and angle it 75 degrees how far from the house will the base of the ladder be
February 14, 2017

Math
The total length of 4 blue banner and 5 yellow banner is 49 m. The total length of 2 blue banner and 1 yellow banner is 17 m. All banner of the same colour have the same length. Find the length of a blue banner
February 14, 2017

Physics
two identical metallic ball spherical shells A and B charges 4Q and -10c are kept a certain distance apart a third uncharged sphere C is first placed in contact with sphere A and then with sphere B the sphere B are bought in contact and then separated find the charge on sphere...
February 14, 2017

Pre-Calculus
correction cot(?/2-?)cos?
February 13, 2017

Pre-Calculus
That is indeed hard, someone help this man.
February 13, 2017

Pre-Calculus
explain how to do these with please. I was out a couple of days so give clear instructions. sin(?/2-?)sec? cot(?/2-x)cos?
February 13, 2017

math
If f(x) is an even function and passes through the point (5, 3), what other point must lie on the graph of the function? Explain your reasoning.
February 13, 2017

Math
. The volume of a rectangular box is given by the expression V = (120 ? 6w)w2, where w is measured in inches. a. What is a reasonable domain for the function in this situation? Express the domain as an inequality, in interval notation, and in set notation. b. Sketch a graph of...
February 13, 2017

American History-WWII US
My Apologies Ms. Sue, Thank you for the Configurations.
February 13, 2017

American History-WWII US
Sorry Ms. Sue, I think there is a misunderstanding, I know all the Neutrality Acts, However, I am unable to know how all these acts connect together as the laws continued on.
February 13, 2017

American History-WWII US
How do the Neutrality Acts of 1935, 37, and 39 become less Neutral?
February 13, 2017

calculus
can someone also help me ndertsand this question ; y=x^3 +2x^2+3 represents the rate of an object over the interval [7, 10]. What is the average rate of the object over the time interval?
February 13, 2017

calculus
can someone help me with this problem y=x^2 -9 represents the velocity of an object over the interval [1, 5] in meters per second. What is the displacement of the object over the time interval?
February 13, 2017

physics
A car moves in a straight line with constant acceleration. Starting from rest at t=0 it travels 8.0 m in 4.0 s. What is the speed of the car at t= 4 s. PLEASE explain :)
February 13, 2017

English composition
Write a debate on the against the motion men should help at the kitchen
February 13, 2017

value
ACAR OF MASS 1200KG TRAVEL OF SPEED OF 20M PERSECOND IF ITS ENGINE DEVELOPS INTO 3KW,FIND THE FORCE USED
February 13, 2017

math
A skydiver jumps from an airplane at an altitude of 2,500 ft. He falls under the force of gravity until he opens his parachute at an altitude of 1,000 ft. Approximately how long does the jumper fall before he opens his chute? h(t) = -16t2 + vt + h0 A. 2.4 s B. 9.7 s C. 12.5 s ...
February 13, 2017

physics
A car moves in a straight line with constant acceleration. Starting from rest at t=0 it travels 8.0 m in 4.0 s. What is the speed of the car at t= 4 s. PLEASE explain :)
February 13, 2017

Math
Can someone please help me understand box-and-whisker plots? I get really confused on what each thing is and how to plot it. Thanks.
February 13, 2017

Science/Weather
c
February 13, 2017

physics
calculate angular momentum and rotational kinetic energy of earth about its own axis
February 13, 2017

Maths
AB is a line segment and M is its mid point. Semicircle are drawn with AM,MB and AB as diameters on the same side of line AB. A circle (O, r) is drawn so that it touches all 3 semi circles . prove that r=1/6 AB.
February 13, 2017

Maths
Show that the mid point of line joining points (-5,12) and (-1,-12) is a point of trisection of the line joining the points (-8,-5) and (7,10).
February 13, 2017

Social Studies
Thanks , is 2. The largest portion of society , who owned a small amount of land.
February 13, 2017

Social Studies
1. What was described as the ' hardest work " slaves did ? ( 1 point ) A. work in the rice fields* B . Work in the tobacco fields C. Work in the lumber business D. Work loading and unloading ships in port 2. which of the follow best describes the social class of a ...
February 13, 2017

Math
47
February 13, 2017

Math
You have to form a right triangle where the top of the cliff to the boat is the hypotenuse. Then to find how far the boat is from the foot of the cliff, you do cos(26.2)=a/90. To find how far the boat is from the top of the cliff, you do sin(26.2)=90/b.
February 12, 2017

Math
From the top of a Cliff 90metre high, the angle of depression of a boat on the sea is 26.2 degree.calculate how far the boat is from the from the foot of the cliff and from the top of the cliff
February 12, 2017

Statistics
Assume that the mean systolic blood pressure of normal adults is 120 millimeters of mercury (mm Hg) and the standard deviation is 5.6. Assume the variable is normally distributed. If an individual is selected, find the probability that the individual's pressure will be ...
February 12, 2017

health
The goal of health/safety education is...
February 12, 2017

Physics Answer Check
A note played by a musical instrument has a frequency of 130.8 Hz. What would be the length of the pipe if an organ pipe had this frequency as the fundamental and if the speed of the sound in the pipe is 350 m/s? f = v/2L 130.8(2L) = 350 2L = 2.68 L is about 1.34 m.
February 12, 2017

math
four times a number minus 8 is equal to two times the number plus 12
February 12, 2017

Math
Sorry It actually did
February 12, 2017

Math
The answer above didn't work
February 12, 2017

Math
Prove 3(x+1)(x+7)-(2x+5)² is never positive So, 3(x+1)(x+7)-(2x+5)(2x+5) =3(x²+8x+7)-(4x²+20x+25) =3x²+24x+21-4x²-20x-25 =-x²+4x-4
February 12, 2017

math
8 kilometer is how many meters
February 12, 2017

Economics
An article in The Wall Street Journal discusses a trend among some large U.S. corporations to base the compensation of outside members of their boards of directors partly on the performance of the corporation. “This growing practice more closely aligns the director to the...
February 12, 2017

Managerial Economics
An article in The Wall Street Journal discusses a trend among some large U.S. corporations to base the compensation of outside members of their boards of directors partly on the performance of the corporation. “This growing practice more closely aligns the director to the...
February 12, 2017

Physcis 1315
h=v?t+gt²/2, v=12 t=1 g=9.9
February 12, 2017

Physcis 1315
A ball is thrown vertically downward with a velocity of 12m/s How far has the ball fallen 1 s later?. 2s later?
February 12, 2017

math
Ann has $300 in a savings account that earns 1.75% simple annual interest. in how many years will she have$21 in Interest?
February 12, 2017

Physics
The angle between two vectors (F? and F?) is 90-28=62° The second angle of the force parallelogram is (360 -2•62)/2= 118°. Cosine law gives F=sqrt (F?² +F?² -F?•F?•cos118°)= 9.2 tan ? = (5+5.9•sin28°)/5.9•cos28° =1.49 ? = ...
February 12, 2017

Chem
Water was decomposed by the following reactions. Calculate the mass of HCl produced from 50.0 mL water assuming the following yields H2O=H2+O2 90% H2+Cl2=HCl
February 12, 2017

Chem
I need to do this using dimensional analysis
February 12, 2017

Chem
what mass of ammonia nh3 is necessary to react with 2.1 x 10^24 molecules of oxygen when ammonia reacts with oxygen to form water and nitrogen dioxide
February 12, 2017

Math
1. x+y = 9 2xy=40 x=9-y 2(9-y)y=40 y²-9y+20=0 y= 9/2 ±sqrt(81/4 – 20) y?=5, y? =4 => x?= 4, x?=5 2. x-y=4 x²+y² =208 x=4+y, (4+y)² + y² =208, y²+4y-96=0 y= - 2±sqrt(4+96) y?=8, x?= 12 , y? = -12 ( this root doesn’t meet ...
February 12, 2017

physic
The angular velocity is ?=v/R, the frequency is f= ?/2? the centripetal force is F=mv²/R
February 12, 2017

Physics
Work=Heat - internal energy W=A-U
February 12, 2017

PHYSICS
-------------a ....../1\..... ...../ 1 \.... B C
February 11, 2017

PHYSICS
--------------A /l\ / 1 \ / 1 \ / 1 \ 1 B C the pendulum has a string of .075m. velocity at c is 3.83m/s how do i find the speed at point b when the angle of B and C is 37 degree
February 11, 2017

*physics*
what is the smallest time in which a 9.00kW motor can lift a 3500 kg elevator to a height of 9.50m? use 10m/s^2 as g.
February 11, 2017

Physics
A car accelerates a form an initial speed to higher final sped while the engine puts out constant power. During this time period, magnitude of the car's acceleration was .. a increasing b decresing c constant d unpredictable please explain why also.
February 11, 2017

English
What did sodhi think of goeff
February 11, 2017

n
A ferris wheel is 20 meters in diameter and boarded from a platform that is 1 meters above the ground. The six o'clock position on the ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 6 minutes. The function h = f(t) gives your ...
February 10, 2017

Math
What is 7/3?
February 10, 2017

math
An open box is to be made from a square piece of material by cutting four-centimeter squares from each corner and turning up the sides (see figure). The volume of the finished box is to be 576 cubic centimeters. Find the size of the original piece of material.
February 10, 2017

physics
How much heat energy must be added to a 3.0 cm × 3.0 cm × 3.0 cm block of aluminum to raise its temperature from -50?C to 50?C?
February 10, 2017

Algebra
In an infinite geometric progression with positive terms and with a common ratio |r|<1, the sum of the first three terms is (26/3) and the sum of the entire progression is 9. Determine the progression. Find the first term and common ratio
February 10, 2017

Algebra
Find the sum of the first five terms of an infinite geometric progression with a common ratio |r|<1 if the second term is (4/3) and the ratio of the sum of the squares of the terms of the progression to the sum of the terms of the progression is 3:1.
February 10, 2017

social studys
How did thjis all begin
February 10, 2017

math
What is the side length of the smallest square plate on which a 26?-cm chopstick can fit along a diagonal without any? overhang?
February 10, 2017

Science
1.A 2.B
February 10, 2017

Science
I meant burn
February 10, 2017

Science
although electromagnetic waves differ in the wavelengths they all travel at the speed of light which is A.300,00km/s B.6000km/h c.100km/s d.10,00km/s A rocket is a motor that can urn fuel without requiring A.water B.air c.electricity d.fire
February 10, 2017

Health
What are some ways to stay awake during studying for tests at night?
February 9, 2017

cience
Henry was given this cool toy for his birthday; he can use it to tell how fast someone is moving at that moment in time. The toy must calculate the person's
February 9, 2017

Algebra II
Determine if the binomial is a perfect square binomial. If so, show the original monomial squared. X^2 + 16 X^2 + 4
February 9, 2017

Math/Chemistry
ln(Ao/A)=kt => (Ao/A)=e^kt => Ao/e^kt=A => A=Aoe^-kt (1st order integrated rate law)
February 9, 2017

Math/Chemistry
This is from the 1st order integrated rate law => A = Aoe^-kt solve for Ao = A/e^-kt =Ae^kt (I showed solution for A in earlier post from (ln) function.)
February 9, 2017

Chemistry
Based on data given, Rate = k[NO2][F2]^1.2 Pick any row and substitute concentration and rate values. Solve for k. I got 115.4 M^-1.s^-1
February 9, 2017

Algebra II
Find the perfect square binomial x^2 + 16 Answer: x^2 + 4
February 9, 2017

life orientation
yah
February 9, 2017

Social Studies
That answer was wrong the right answer is farmers and aristocrats!!!!!!!!
February 9, 2017

Social Studies
Thanks Ms.Sue
February 9, 2017

Social Studies
In Chinese society, merchant class ranked below the 1. farmers and aristocrats 2. landowners and traders 3. aristocrats and priests ****** 4. bankers and farmers Please check my answer
February 9, 2017

math HELP PLEASE
What is the shaded area??
February 9, 2017

science
Thank You Cassandra. I made a 100 on my test .
February 9, 2017

science
The Sun is unusual because it does not belong to a ____ ? A) solar system B) universe C) galaxy D) binary star system I think the answer is D but I'm not 100% positive.
February 9, 2017

20/15 in lowest terms.Express your answer mixed n
I need answer for this question
February 9, 2017

Social Studies nhf
Thank you to anyone who answers this! I know it is long, but I want to make sure and positive that it is corect!
February 9, 2017

Social Studies nhf
The Two systems that move your body are the skeletal and the muscular systems. Muscles connect to your skeleton and they contract and move the skeleton along.
February 9, 2017

Social Studies nhf
Thank you! BTW, nhf stands for need help fast :) thank you again in advance!! All right! So, I have a few essay questions I want to make sure are right! This is really important to me and I am not that good in science. Please help me!! Here goes everything! (6 points) 1. ...
February 9, 2017

history please help! Check my answers!
What three products are columbia famous for???? 1.Beef, candy, sapphires 2. Tea, perfume and diamonds * or 3. cofee, flowers and emeralds *
February 9, 2017

chemistry
You need the Kb value for Ammonium Hydroxide to complete the problem. Kb(NH4OH) = 1.8 x 10^-5 Calculate the Ka for NH4^+ Hydrolysis reaction = Kw/Kb Set equal to the hydrolysis Ka expression for ... NH4^+ + HOH <=> NH4OH + H^+ C(eq) 0.10 - x x Ka =[NH^4OH][H^+]/[NH4...
February 9, 2017

Maths
Co ordinates of a point which isbat+3 diatancecfrom points(1,-3) of line 2x+3y+7=0 ?
February 9, 2017

Math
Thehe sum of the ages of Dorothy and Darlene is 41. In 5 years, Dorothy will be twice as old as Darlene. Find their ages 3 years ago.
February 9, 2017

physics
Well, perhaps that is the force the ball exerts on your hand?
February 9, 2017

Math derivatives
Develop a rule for the following: Dx[f(x)g(x)/h(x)]
February 9, 2017

Math - Derivatives
Find all points on the graph of y=1/4x^4+2/3x^3-5/2x^2+6x+7 where the slop of the tangent lins is 12.
February 9, 2017

Physics
A boat starting on one side of the river heads to the south with a speed of 1.5 m/s, the river flows to the east at .8 m/s. What is the resultant velocity to the side of the river? And if the river is 50 m wide calculate the displacement of the boat
February 8, 2017

fractions
I have 12 cookies I ate 3 how would I write what I ate in a fraction
February 8, 2017

Math
put a number into h and solve for v ex: h V 0 288 1 276 2 264 and so on.
February 8, 2017

Social Studies
Hello??
February 8, 2017

Social Studies
I pick number 3 am I right?
February 8, 2017

Social Studies
In Chinese society, the merchant class ranked below the 1. farmers and aristocrats 2. landowners and traders*** 3. aristocrats and priests 4. bankers and farmers Can someone please check my answer?
February 8, 2017

math
56/60 to get mile per min. 56/60*45 to get miles traveled in 45 min. 50/60/60 to get mile per sec 50/60/60*45 to get miles traveled in 45 sec. add the amount of 45 min and sec together to get final answer.
February 8, 2017

math
A car travels at a constant speed of 56 miles per hour. How far will it travel in 45 minutes and 45 seconds?
February 8, 2017

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