Saturday

April 18, 2015

April 18, 2015

Total # Posts: 696

**math 8th grade**

Face cards are removed from a standard deck of cards and the rest are set aside. two cards are drawn at random from the face cards. once a card is selected, it is not replaced. Find each possibility. P(jack and then king)? P(two black cards) answer 1/2 ?
*April 13, 2015*

**math **

Suppose h(x)=1/\sqrt x for x>0. Does h have an inverse? If so, find h^-1(4).
*March 26, 2015*

**algebra **

Suppose g(x)=4x^2+8x+13. Does g have an inverse? If so, find g^{-1}(25)
*March 26, 2015*

**geometry **

In quadrilateral QRTS, we have QR = 11, QS = 9, and ST=2. Sides line RQ and line ST are extended past Q and S, respectively, to meet at point P. If PS = 8 and PQ = 5, then what is RT?
*March 26, 2015*

**Chemistry CP**

Water has a much higher specific heat capacity than most liquids. Explain in terms of the attractive forces between water molecules.
*March 25, 2015*

**math**

what is set-up for three dollars less than half of $128. ?
*March 18, 2015*

**math**

Aisha invests twice the amount invested the previous month. If she invested $26.25 during the 1st month, how much did she invest during the 6th month?
*March 18, 2015*

**math**

Option A $5.75 for each visit Option B Yearly membership for $99, plus $.50 for each visit write an inequality that can be used to determine the minimum number of times a person would need to visit the gym in a year in order for option B to be less expensive than option A. $5....
*March 1, 2015*

**math**

a traffic sign casts a shadow 6ft long while a mailbox next to it casts a shadow 3ft long. if the traffic sin is 7 ft high how tall is the mailbox
*March 1, 2015*

**geometry**

Given five segments of length 2,3,5,8, and 13, what is the number of distinct triangles that can be formed using any three of the segments?
*February 25, 2015*

**math**

When looking at a quilt pattern, how do you describe the minimum number of translation of a square A. There is 16 total squares.
*January 19, 2015*

**geometry**

When looking at a quilt pattern, How do you describe the minimum number of translations of the original pattern A
*January 18, 2015*

**science**

a box weighs 200 N. If you push on the box with a force of 15 N and the box does not move, how much work did you do? A) 0 J B) 15 J C) 15 N or D) 3000J
*January 16, 2015*

**physics**

An ambulance is going away from me @ 40mph with a siren @ 1000Hz.Will I heat a higher or lower frequency
*January 13, 2015*

**math**

Thank you!!
*January 11, 2015*

**math**

Together Marc and Paul have $32 Marc has $4 less than twice the amount Paul has. How much does each man have? How do I set this up -4+2x=32 ??
*January 11, 2015*

**I did it.. Check Plz?**

thanks.
*January 2, 2015*

**I did it.. Check Plz?**

Okay.. Im going with B, Its ryhmes.but then again I was gonna say D. Oh well Im just gonna gonna do it, and hopefully some are right. Because this isnt all the questions. Thanks again
*January 2, 2015*

**I did it.. Check Plz?**

A hat I think, the poem is That Old Straw Sojourner..
*January 2, 2015*

**I did it.. Check Plz?**

@Writeacher Yes. Its "It" Kinda confusing but yes
*January 2, 2015*

**I did it.. Check Plz?**

None.. See I dont really understand how to compare that line to one of the literary devices. eh i give up thanks !
*January 2, 2015*

**I did it.. Check Plz?**

It saw with lucid eyes inhuman, divine Line 12 has an example of a stylistic device. What is that device called? A)allusion B)inversion <--- or A C)satire D)simile ------------------------------------ It’d seen a child die—Depression--a war,Bowed at the bedside of...
*January 2, 2015*

**Check Answers?**

Question 1 of 5 The yellow fog that rubs its back upon the window-panes, The yellow smoke that rubs its muzzle on the window-panes, Licked its tongue into the corners of the evening, Lingered upon the pools that stand in drains, Let fall upon its back the soot that falls from...
*January 2, 2015*

**Poem**

Question 4 of 5 'Hope is the thing with feathers That perches in the soul, And sings the tune--without the words, And never stops at all, 'And sweetest in the gale is heard; And sore must be the storm That could abash the little bird That kept so many warm. 'I'...
*January 2, 2015*

**English Please.**

It had been there when the midwife had announced, ‘You’ve a boy.’ The hat was there when his wife had their second little joy. Why does the author MOST likely choose the words, ‘their second little joy’? A)They had twin boys. B)It expresses that their ...
*January 2, 2015*

**Algebra**

Points A(3,5) and B(7,10) are the endpoints of a diameter of a circle graphed in a coordinate plane. How many square units are in the area of the circle? Express your answer in terms of pi.
*December 18, 2014*

**physics**

In the drawing, the weight of the block on the table is 428. N and that of the hanging block is 195. N. Ignore friction, the mass of the rope, and the mass of the pulley. Find the acceleration of the two block system in m/s2.
*December 14, 2014*

**physics**

A cup of coffee is sitting on a table in an airplane that is flying horizontally. The coefficient of static friction between the cup and the table is 0.258. Suddenly, the plane accelerates horizontally. What is the maximum acceleration (in m/s2) that the plane can have without...
*December 14, 2014*

**physics**

A student is skateboarding down a ramp that is 6.52 m long and inclined at 19.8 degrees with respect to the horizontal. The initial speed of the skateboarder at the top of the ramp 2.24 m/s. Neglect friction and find the speed at the bottom of the ramp in m/s.
*December 14, 2014*

**math**

find the volume triangular pyramid: triangle base 20mm triangle height 22mm, pyramid height 14mm
*November 16, 2014*

**math**

what is a fraction for 10.188888888888888?
*November 13, 2014*

**math**

kade bought 6 cookies for $4.80. At this rate, which equation can be used to find c, the cost of 3 dozen cookies?
*November 11, 2014*

**Ap History (Stuck on one last question , Please !**

What are some aspects of the modern American political party system that began during the Jackson era? A) beginnings of political action committees and fundraising B) widespread campaigns for the popular vote, including fliers, slogans, and songs C) start of campaign tours ...
*November 10, 2014*

**physics**

. A 2.0 kg brick has the dimensions 7.5 cm x 15 cm x 30 cm. Find the pressure exerted by the brick on a table when it is resting on its various faces.
*November 8, 2014*

**physics (work/nonconservative forces)**

An object moving along a horizontal track collides with and compresses a light spring (which obeys Hooke's Law) located at the end of the track. The spring constant is 47.3 N/m, the mass of the object 0.230 kg and the speed of the object is 1.80 m/s immediately before the ...
*November 6, 2014*

**Chemistry **

If the minimum (threshold) energy for the emission of an electron from the surface of a particular metal is 3.90 X 10-19 J, what is the kinetic energy of an electron emitted from the surface of the metal when it is irradiated by electromagnetic radiation of wavelength 213 ...
*October 10, 2014*

**Chemistry **

What amount of energy is required to melt a 27.4 g piece of ice at 0oC? The heat of fusion of ice = 333 Jg-1 Heat required to melt the ice 9.12e3 = J What amount of energy must be removed from 123 g of water to cool it from 71.6oC to 9.41oC? Specific heat of water = 4.184 JK-...
*October 2, 2014*

**physics**

A book of mass 7 kg rests on a plank. You tilt one end of the plank and slowly increase the angle of the tilt. The coefficient of static friction between the book and the plank is 0.40. What is the maximum angle of tilt for which the book will remain stationary and not slide ...
*September 24, 2014*

**physics**

A flatbed truck is supported by its four drive wheels, and is moving with an acceleration of 7.4 m/s2. For what value of the coefficient of static friction between the truck bed and a cabinet will the cabinet slip along the bed surface?
*September 24, 2014*

**Statistics**

The Graduate Record Examination (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: 1. Draw a rough sketch, darkening the ...
*September 22, 2014*

**writing**

Bing (common search engine) iSEEK Education (academic search engine) MetaLib metasearch engine) ( What types of information did each search provide? Discuss what features you like and dislike about each of the search engines.
*September 18, 2014*

**information literacy**

.Why do we need information? What sources do you already use to obtain personal information
*September 14, 2014*

**Chemistry**

Name the property that each change depends on. Then classify the property as either chemical or physical. a) You separate a mixture of gravel and road salt by adding water to it b) Carbon dioxide gas freezes at a temperature of -78C
*September 8, 2014*

**Psychology**

1) Your companion is in favor of staying hidden and simply watching the tribe so that you can understand how they live. You feel however that you could better understand how they live (and how to SURVIVE!) if you make your presence know and join the tribe. What kinds of ...
*September 1, 2014*

**trigonometry**

graph y=-3sec(2x-pi/3)proved the period vertical translation and the phase shift
*July 22, 2014*

**finance**

What is the payback period of the following project? Initial Investment: $50,000 Projected life: 8 years Net cash flows each year: $10,000
*July 19, 2014*

**Microeconomics**

Correcting for negative externalities - Regulation versus tradablepermits Suppose the government wants to reduce the total pollution emitted by three local firms. Currently, each firm is creating 4 units of pollution in the area, for a total of 12 pollution units. If the ...
*May 29, 2014*

**Finance**

What is the present value of $3,800 at 8.9 percent compounded monthly for five years. Thurs far, I have P= ?/(1+i)n (1 + 0.89/12)12*5 (1.0074167)60
*May 12, 2014*

**Mathematics**

I need help finding the exact value of sin (a + b), given that sin a =3/5 and sin b = 5/13, with a in quad 2 and b in quad 1.
*May 9, 2014*

**chemistry**

Calculate the amount of CO2 formed when 50 grams of CaCO3 decomposes?
*May 2, 2014*

**math **

4 red,5 blue,1 yellow marble Find the probability of picking a red marble then not replacing it and then drawing a blue marble. answer as a fraction,decimal and percent.
*April 20, 2014*

**math**

how many ways can 10 runners finish a race. 10 could finish 10 9 could finish 9 and so on would I times 10*9*8 ect that number seems way to big.
*April 20, 2014*

**5TH GRADE MATH**

Need help trying to tell my daughter what or how to draw this........ DRAW a figure composed of three different rectangles that has a perimeter of 140 yards. Use measurements that are in yards and feet to label the sides of your figure......
*April 16, 2014*

**math**

Thank you I was trying to over think that problem.
*April 13, 2014*

**math**

Sue has a list of 8 CDs and 5 DVDs that she wants to buy. Her friends randomly select one item to give her. What is the probability Sue's friend will select a CD? a DVD?
*April 13, 2014*

**statistics**

A large number of applicants for admission to graduate study in business are given an aptitude test with a resulting mean score of 460 with a standard deviation of 80. The top 2.5 percent of the applicants would have a score of at what? A. 606 B. 617 C. 600 D. 646
*April 11, 2014*

**math**

The height of a soccer ball that is kicked from the ground can be approximated by the function y=-16x^2 +32x where y is the height of the soccer ball on feet x seconds after it is kicked. Graph this function. find the soccer balls maximum height, and the time it takes the ...
*April 9, 2014*

**math**

Have to write the number would it be 505200000000000
*April 7, 2014*

**math**

5.052 x 10^14
*April 7, 2014*

**math**

what is -8 squared +(17 - 9)x 4 + 7
*March 26, 2014*

**chem**

at a certain temperature, .700 mol of SO3 is place in a 4.50-L container. 2SO3(g)--2SO2(g)+O2(g) At equilibrium, .140 mol of O2 is present. Calculate Kc
*March 14, 2014*

**Chemistry**

What is the minimum amount of 5.9M H2SO4 necessary to produce 27.7g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H2(g)
*March 5, 2014*

**physics**

A uranium nucleus (mass 238 u), initially at rest, undergoes radioactive decay. After an alpha particle (mass 4.0 u) is emitted, the remaining nucleus is thorium (mass 234 u). If the alpha particle is moving at 0.055 the speed of light, what is the recoil speed of the thorium ...
*March 3, 2014*

**History**

Anti-catholic sentence erupted in Maryland when in 1689, news arrived of the deposition of
*March 1, 2014*

**Math**

x-1=4 2/3
*February 18, 2014*

**math**

in a department sore there are red t-shirts, blue t-shirts, and yellow t-shirts. 3/7 of the shirts are red, 1/3 are blue and the rest are yellow. if there were 20 more red than blue, how many were yellow?
*February 6, 2014*

**math**

amamda is 12 years old. she is 2/7 times as old as her father. how many years ago was her father 4 times as old as amanda?
*February 6, 2014*

**accounting**

don't know
*February 4, 2014*

**URGENT: Please help with Physics**

Suppose the mass of each of two spherical objects is doubled, and the distance between their centers is three times as large. How is the magnitude of the force of gravity between them affected? (Points : 5) It is 4/9 as large. It is 4/3 as large. It is 2/9 as large. It is 3/2...
*January 15, 2014*

**PHYSICS, please help quickly**

Thank you for your help
*January 15, 2014*

**PHYSICS, please help quickly**

The velocity of an object increases from 5.0 m/s to 15 m/s in 2.0 s. What is the average acceleration of the object? -10 m/s2 -5.0 m/s2 +5.0 m/s2 +10 m/s2
*January 15, 2014*

**Math, please help**

Which of the following are trigonometric identities? (Can be more then one answer) tanx cosx cscx = 1 secx-cosx/secs=sin^2x 1-tanxtany=cos(x+y)/cosxcosy 4cosx sinx = 2cosx + 1 - 2sinx Find all solutions to the equation cosx cos(3x) - sinx sin(3x) = 0 on the interval [0,2π...
*January 14, 2014*

**Math Check 2 ?s quick**

Thank you so much!
*January 14, 2014*

**math**

A choir is singing at a festival. On the first night 12 choir members were absent,so the choir stood in 5 equal rows. On the second night only one member was absent, so they stood in 6 equal rows. the same number of people stood in each row each night. How many members are in ...
*January 14, 2014*

**Math - Algebra**

Four digit number. Greater than 4000. Sum of its hundreds digit and it's ones digit is 9. Twice it's tens digit is 2 more than its thousands digit. Sum of one- fifth of its hundreds digit and two-thirds of its ones digit is 6. It's 10 digit is 1 less than its ...
*January 4, 2014*

**social studies**

would military spending be a modern example of a centrally planned economic system
*December 15, 2013*

**math**

Members of the Campus Roller Rink pay a yearly membership fee of $50 plus $5 each time they go skating. nonmembers pay $10 each time the go skating. How many times would both members and nonmembers have to go skating in a year in order to pay the same amount?
*November 7, 2013*

**math**

5/8a+6=3/4a 6=1/8a a=6/8 is this correct? thank you.
*November 7, 2013*

**algerbra**

Keisha read twice as many books this year as ben read. subtracting 4 from the number of books Keisha read and dividing by 2 gives the number of books Sheldon read. Sheldon read 10 books. How many books did Ben read?
*November 4, 2013*

**Physics**

the incline is 30 degrees
*November 3, 2013*

**Physics**

A car starts rolling down a l-in-4 hill (l-in-4 means that for each 4 m traveled along the road, the elevation change is 1 m). How fast is it going when it reaches the bottom after traveling 55 m? (a) Ignore friction, (b) Assume an effective coefficient of friction equal to 0....
*November 3, 2013*

**Physics**

agent dave, flying a constant 215 km/hr horizontally in a low - flying helicopter wants to drop a small explosive onto a master criminal automobile travelling 155km/hr on a level highway 78m below. At what angle (with the horizontal) should the car be in his sights when the ...
*October 22, 2013*

**Physics**

agent dave, flying a constant 215 km/hr horizontally in a low - flying helicopter wants to drop a small explosive onto a master criminal automobile travelling 155km/hr on a level highway 78m below. At what angle (with the horizontal) should the car be in his sights when the ...
*October 22, 2013*

**algebra**

A video store charges a monthly fee of 7.50, but the charge to rent each movie is only 1.00 per movie. Another store has no membership fee, but it costs 2.50 to rent each movie. How many movies need to be rented each month for the total fees to be the same from either company?
*October 1, 2013*

**algebra**

2/8=x+2/72
*October 1, 2013*

**math**

how many Km are in 1000dm?
*September 30, 2013*

**Pysch**

______is to biological factors as ___________ is to cultural factors? a. Race; ethnicity b. nurture; diversity c. Individualism; collectivism d. Ethnicity; race
*September 15, 2013*

**Science**

arrange the following aqueous solutionsin order of increasing freezing points(lowest to highest temperature): 0/10m glucose, 0.10m BaCl2, 0.20mNaCl, and 0.20m Na2SO4.
*September 11, 2013*

**history**

Thank you Ms Sue
*September 8, 2013*

**history**

The perioeci and helots revolted against which city-state? In the golden age of Greece an Athenian worked in the morning and did what in the afternoon?
*September 8, 2013*

**physics**

You are driving a car 35mi/h down the road. The stoplight in front of you suddenly turns red and you slam on the brakes, skidding to a halt. You get out of the car and measure the skid marks made by your tires to be 28.5m meters. (Assume positive x to be in the forward ...
*September 1, 2013*

**math**

write the algebraic expression the quotient of 100 and the quantity6 plus w (6+w)/100 the quotient of 23 and u minus t 23/u-t would these be correct?
*August 22, 2013*

**what you read**

what word in the sentence is most clearly a loaded word?
*August 14, 2013*

**chemistry**

Barium carbonate and nitric acid: BaCO3 (s) + 2HNO3 (aq.) --> Ba2+ (aq.) + 2(NO3-) (aq.) + CO2 (g) + H2O (l) If 25.0mLs of 0.150M nitric acid was used, how many grams of barium carbonate would be required for complete reaction?
*July 2, 2013*

**chemistry**

Using the equipment below, explain how to prepare a 0.00052M HCl solution from a reagent bottle containing 0.13M HCl using only the equipment listed below. Note, you may make multiple dilutions, but you are not allowed to combine volumes. For example, if you need 2 mLs of a ...
*July 2, 2013*

**Physics**

a 3.6 kg object is accelerated from rest to a speed of 34.4 m/s in 42 s. What average force was exerted on the object during this period of acceleration. Answer in units of N.
*June 30, 2013*

**Physics**

Consider a coin which is tossed straight up into the air. After it is released it moves upward, reaches its highest point and falls back down again. Air resistance can be neglected. What force acts upon the coin while it moves upward after it is released? a. Force of zero b. ...
*June 30, 2013*

**chemisty**

calculate the heat energy released when 25.8 g of liquid mercury at 25 C is converted to solid mercury at its melting point. Constants for mercury at 1 atm: heat capacity of Hg-->28.0 melting point-->234.32 K enthalpy of fusion-->2.29 kj/mol
*June 27, 2013*

**chemistry**

Two 20.0 g ice cubes at -16.0 C are placed into 285 g of water at 25.0 C. Assuming no energy is transferred to or from the surroundings, calculate the final temperature of the water after all the ice melts. heat capacity of H2o(s)-->37.7 heat capacity of H2o()-->75.3 ...
*June 27, 2013*