# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 720-
## Chemistry

what are the other chemistry forms present in the dichloromethane solution besides the normal neutral forms for benzoic acid and quinine? (benzoic acid,pKa 4.2; quinnie, pKa 8.5)

*asked by Nancy on March 31, 2009* -
## geometry

A rectangular field is 64 m X 25 m. Shawn wants to fence a square field that has the same area as the rectangular field. How long are the sides of the square field? Please explain the thinking behind your solution strategy.

*asked by corina ruybal on August 8, 2012* -
## chemistry

Calculate the solubility of silver chloride in a 0.1 mol/L solution of sodium chloride at 25°C.? At SATP, Ksp AgCl(s) = 1.8 x 10^-10 What did I do wrong? AgCl Ag+ + Cl- [Ag+] = x [Cl-] = x + 0.1 Ksp = [Ag+] [Cl-] 1.8 x 10^-10 = (x) ( x + 0.1) x = molar

*asked by Marcus 2nd question on March 30, 2008* -
## Chemistry

The vapor pressure of benzene (C6H6) at 25 degrees C is 95.1 mm Hg. What is the vapor pressure of benzene above a solution in which 5.05 g C6H5COOH (benzoic acid) is dissolved in 25 g C6H6? Answer should be 93.9 mmHg

*asked by Jacqueline on February 18, 2013* -
## English

Illustration essay: Succesful student In order to be succesful college student must be punctual to class and dedicated to his work. For instance if a student is punctual and comes to class daily : He will be constantly reminded of the upcoming assignments

*asked by HM on September 25, 2011* -
## Math

I need help with these problems for a test. 1. Find the inverse of the one-to-one function. f(x)=5x+1/4. 2. The height of the water, H, in feet, at a boat dock t hours after 7 am is given by E=7+4.4cos pi/35 t, where t is time measured in seconds. Find the

*asked by David on June 14, 2010* -
## Chemistry

15.00g of ammonium nitrate decomposes into an expandable container acoording to the following equation. 2NH4NO3 ==> 2N2 g + 4H2O g + O2 g which has the highest partial pressure a. N2 b. H2O c. O2 i am not sure how to approach this problem. is there a

*asked by Anonymous on October 4, 2016* -
## Algebra

Please help me to to solve this quadratic equation word problem. Here is the question: Studying Microgravity. NASA'S Glen Research Center in Cleveland, Ohio, has a 435-foot drop tower that begins on the surface and descends into Earth like a mineshaft. How

*asked by lpcruz on December 5, 2014* -
## social studies

wich of the following was one of the influences of the roman republic in the framing of the constitution? 1a centralized government that provides for more order 2elected representatives who are the voice of the people 3a judicial system that is controlled

*asked by Christopher wood on October 4, 2017* -
## Chemistry Dr BOB

A voltaic cell has one half-cell with a Cu bar in a 1.00 M Cu2+ salt and the other half-cell with a Cd bar in the same volume of a 1.00 M Cd2+ salt. Report your answers to the correct number of significant figures. a)Find E degree cell, delta G degree ,

*asked by Patrick on November 29, 2015* -
## xxx

If ( cos ᶿ + sin ᶿ)= ã2 cos ᶿ, show that (cos ᶿ-sin ᶿ) = ã2sin ᶿ

*asked by anne on September 15, 2014* -
## Maths

If m times the 'm'th term of an A.P. be equal to n times the 'n'th term, show that is (m+n)th term is zero.

*asked by Satish on January 29, 2019* -
## maths trig need help

show that sinx/(1-cotx)+cosx/(1-sinx)=sinx+cosx thanks

*asked by rap on September 27, 2016* -
## Chemistry

Calcium can also be precipitated out of the solution by adding sodium phosphate (Na3PO4) to form solid calcium phosphate. A.) write a net ionic equation for this process B.)calculate the mass of this precipitate you would generate from treating 1.000 L of

*asked by Mai on March 25, 2014* -
## Algebra

Megan factored the expression -12x^2 +52x-35as (-2x+5)(6x-7). But when Jacob applied the FOIL principle and multiplied out (-2x+5)(6x-7), he got -12x^2+44x-35; thus, Meganâ€™s solution does not appear to check. Why is that? Please help Megan to

*asked by traci on June 29, 2011* -
## Chemistry

Which of the following is a stronger lewis base: cyanide ion or dicarbide ion? I'm assuming it is the dicarbide ion as it is more negatively charged and a compound consisting of 2 carbons is larger and therefore more likely to lose electrons than something

*asked by Kevin on April 22, 2016* -
## Chemistry

For a particular redox reaction NO is oxidized to NO3^- and Cu^2+ is reduced to Cu^+ . Complete and balance the equation for this reaction in basic solution. We are given this as a guide to start NO + Cu^2+ --> NO3^- + Cu^+ I started with: Cu^2+ + 2e- -->

*asked by Heather on April 9, 2014* -
## Chemistry

At -15.0 C, what is the maximum mass of fructose (C6H12O6) you can add to 3.00 kg of pure water and still have the solution freeze? Assume that fructose is a molecular solid and does not ionize when it dissolves in water. I'm confused on how you pick the

*asked by Tracy on February 16, 2012* -
## Chemistry

which a growing human population, scientists believe that clean freshwater will become scarce (limited). a possible solution is to desalinate salt water. using what youve learned in this unit, describe the type of a mixture salt water is and explain how

*asked by Anonymous on September 14, 2018* -
## Chemistry

I am reading through material for a recrystallization experiment, and I had a few things I wasn't sure about; - Why once filtered, should the recrystallization solution be allowed to cool slowly, undisturbed, rather than quickly? and -What makes a good

*asked by Natasha on March 8, 2010* -
## Computers

Show what the final output of this function will be. The answer will be in the form x * Z - y 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

*asked by Dave on August 27, 2009* -
## Computers/Database

So I created normalization steps for this pet and owner table in a database class : Started with Candidate keys, followed by functional dependency break the tables up into tables , then the referential integrity and the end . PET

*asked by Jason on February 18, 2018* -
## History

Civilizations of the Americas Practice 1. Which of the following statements explains why the Aztec continually waged war? A. The Aztec needed prisoners of war to work the land. B. The Aztec needed more people to help build their pyramids. C. The Aztec

*asked by QWERTY on April 14, 2019* -
## PHYSICS

A mass of 0.5kg is attached to a spring. The mass is then displaced from its equilibrium position by 5cm and released. Its speed as it passes the equilibrium position is 50cm per seconds. a) Calculate the spring constant of the spring. b) Calculate the

*asked by Delailah on October 3, 2018* -
## Chem

Compared with a pH of 7, a solution of pH 5 has what times/fraction of the hydrogen concentration? 1. 1/100 2. nearly the same concentration 3. twice 4.5/7 5. 100 times

*asked by Roksana on May 4, 2010* -
## science/chemistry

thank you! What is the molar concentration of hydroxide ions in a solution with a pH of 6? Find the concentration of H ions first.. [H+]= antilog -ph Then, find [OH-] [OH-]= 1*10^-14/[H+]

*asked by Devon on June 5, 2007* -
## chem

an indicator HIn is blue and its anion In- is red, Ka of indicator is 0.0001 at what pH value will a solution containing HIn be blue?

*asked by Chloe on June 2, 2010* -
## Chemistry

What is the ( m/m) % concentration of a tin in a solution of 5.000 grams of tin dissolved in 95.000 grams of copper

*asked by Ruffles on December 4, 2013* -
## chemistry

How do you prepare a 0.4 M solution of sulfuric acid in water starting with concentrated sulfuric acid (18 M) and water?

*asked by Amanda on March 11, 2012* -
## CHEMISTRY

WHAT IS A CHEMICAL WITH A HIGH PH? A saturated solution of sodium hydroxide has a very high pH. IS SODIUM HYDROXIDE ALKALINE VERY

*asked by Anonymous on January 31, 2007* -
## science

What is the freezing point of a solution of 12.0 g of CCl4 dissolved in 750.0 g of benzene? The freezing point of benzene is 5.48°C; Kf is 5.12°C/m.

*asked by Stephanie on May 6, 2009* -
## chemistry

How do you prepare a 0.4 M solution of sulfuric acid in water starting with concentrated sulfuric acid (18 M) and water?

*asked by Amanda on March 11, 2012* -
## Algebra

If you replace the equal sign of an equation with an inequality sign, is there ever a time when the same value will be a solution to both the equation and the inequality?

*asked by Michelle on February 23, 2010* -
## Science- Physics

A young girl (m= 30 kg) rides a skateboard (m= 3.2 kg) at a speed of 4.2 m/s. (a) How much work does the girl have to do to bring herself to a stop? (b) How far does she travel if it takes 6.0 s to stop? (c) What is the magnitude of the stopping force? So

*asked by Marin on October 9, 2014* -
## Math

Still need help with this one: Find the work done in pumping the water over the rim of a tank that is 40 feet long and has a semicircular end of radius 10 feet if the tank is filled to a depth of 4 feet. I've set up an integral that is: 62.4 ∫ [-10,-4]

*asked by Anonymous on December 8, 2016* -
## trig

A radio transmission tower is 471.0 feet tall. A guy wire is to be attached 6 feet from the top and is to make an angle of 23.1 degrees with the ground? How many feet long should the guy wire be? I am confused on how to find the equation for this problem

*asked by Coaco on June 16, 2015* -
## science

Hey, holidays is over. Time to get back to work. whats the answer to this one find the concentration of hcl in g hcl/kg Naoh + Hcl---> b +c 2.991 mol 25.00mL Density=0.952g/ml also Hcl=36.46g/mol I got approx 4.58 x 10^3 g/mol of the top of my head

*asked by Jim_R on September 1, 2009* -
## physics

A 735 N person walks up three flights of stairs, covering a total vertical distance of 10.0 m. If, as is typical, only 20.0% of the caloric (food) energy is converted to work by the muscles, how many joules and food calories of energy did the person use?

*asked by Student B on June 12, 2011* -
## physics

Pete slides a crate up a ramp at an angle of 25◦ by exerting a 290 N force parallel to the ramp. The crate moves at a constant speed. The coefficient of friction is 0.28. How much work did Pete do when the crate was raised a vertical distance of 2.24 m?

*asked by andres on October 14, 2013* -
## Physics

I'm confused about significant digits in multi-step problems. If I have something like (7.004 +0.2230)/(15.1-0.033+12.07) do I first do the addition and round to 4 sig figs and then do the denominator and round to 2 sig figs and finally divide? Or do I

*asked by Katie on February 9, 2009* -
## physics

An elevator starts from rest with a constant upward acceleration and moves 1m in the first 1.4 s. A passenger in the elevator is holding a 6.3 kg bundle at the end of a vertical chord. what is the tension in the chord as the elevator accelerates? The

*asked by alexa on July 2, 2011* -
## Physics

A converging lens (f = 27.5 cm) is used to project an image of an object onto a screen. The object and the screen are 113 cm apart, and between them the lens can be placed at either of two locations. Find the two object distances. (Enter your answers from

*asked by Kate on April 8, 2015* -
## physics

An elevator starts from rest with a constant upward acceleration and moves 1m in the first 1.4 s. A passenger in the elevator is holding a 6.3 kg bundle at the end of a vertical chord. what is the tension in the chord as the elevator accelerates? The

*asked by alexa on July 3, 2011* -
## Chem equilibrium

I don't understand part b NO(g) + O3(g) NO2(g) + O2(g) (a) If 2.50 moles of NO and 3.30 moles of O3 are placed in a 5.30 L flask, what is the equilibrium concentration of O2? Kc = 5.00 ✕ 10-6. .00121 (I got this correct) (b) What percent of the O3

*asked by Anne on September 22, 2016* -
## physics

A block of mass 2.5 kg is pushed up against the vertical wall by a force of 60 N acting at 47◦ to the ceiling. The coefficient of kinetic friction between the block and the wall is 0.67. The acceleration of gravity is 9.8 m/s2 . Find the work done by

*asked by Kaylee on June 27, 2014* -
## Precalc Math

The question says express each repeating decimal as a fraction: 5.23232323 This is my work but my answer doesn't seem right: 100x= 523.23232323 - 10x= 52.23232323 90x= 470.909090 / 90x. \90x x= 5.23232323 What am I doing wrong? And how am I suppose to know

*asked by Diana on September 3, 2015* -
## Math

The question says express each repeating decimal as a fraction: 5.23232323 This is my work but my answer doesn't seem right: 100x= 523.23232323 - 10x= 52.23232323 90x= 470.909090 / 90x. \90x x= 5.23232323 What am I doing wrong? And how am I suppose to know

*asked by Diana on September 3, 2015* -
## Repost- Calculus; someone please help

Please help out. Thank you. A right triangle has one leg on the x-axis. The vertex at the right end of that leg is at the point (3,0). The other vertex touches the graph os y=e^x. the entire triangle is to lie in the first quadrant. Find the maximum area

*asked by Amanda E. on February 9, 2011* -
## physics

An elevator starts from rest with a constant upward acceleration and moves 1m in the first 1.4 s. A passenger in the elevator is holding a 6.3 kg bundle at the end of a vertical chord. what is the tension in the chord as the elevator accelerates? The

*asked by alexa on July 4, 2011* -
## physics

a 715 N person walks up three flights of stairs, covering a total vertical distance of 10.5 m. (a) If, as is typical, only 20% of the caloric (food) energy is converted to work by the muscles, how many joules and food calories of energy did the person use?

*asked by physics student on October 25, 2009* -
## Math

You can write the equation y=x+4 in different ways. Which of these is correct ? x+y=4 x=4+y y-x=4 y+4=x x=y-4 There could be a couple of ways ... Please help I do not have a clue on this. I will be very greatful if you could help in the next 30 mins xxxx

*asked by Emma on April 18, 2007* -
## IT

Use Microsoft® Project to develop a Work Breakdown Structure (WBS) for your project defined in Week 2. Include a 100- to 150-word description of how and why you would use a WBS in a project. · Post your completed WBS and my project is on upgrading a

*asked by Becky on May 27, 2009* -
## physics

Pete slides a crate up a ramp at an angle of 27◦ by exerting a 242 N force parallel to the ramp. The crate moves at a constant speed. The coeﬃcient of friction is 0.4. How much work did Pete do when the crate was raised a vertical distance of 2.22 m?

*asked by Anonymous on March 13, 2013* -
## Physics

a wrecking ball weighing 2500 N hangs from a cable. Prior to swinging, it is pulled back to a 20 angle by a second, horizontal cable. What is the tension in the horizontal cable? We recently started these problems, and I still am so lost with them. Sorry

*asked by Allyson on October 17, 2016* -
## English

Can someone edit this for me please?? What female born in the 1800's was full of bravery and determination? What female risked her life to save others? What female was a Conductor in the Underground Railroad, Spy for federal forces in South Carolina and a

*asked by Kayla on November 13, 2010* -
## physics

hi- I have a problem I can't seem to get right. here it is. "A retired bank president can easily read the fine print of the financial pages when the news paper is held no close than arm's length, 66.4 cm from the eye. What should be the focal length of an

*asked by Ty on June 8, 2008* -
## literature

HELP PLEASE!!! Can you state the aspect of style revealed in this quote so I can write a paper? "Clyde if I could only die. That would solve all this. And I have prayed and prayed that I would lately, yes I have. For life does not mean as much to me now as

*asked by Mark on September 6, 2013* -
## Electrical Engineering

Find the latitude at Stanford University using Google Maps to the nearest degree (This is how you do it) and calculate the Air Mass Factor on the autumnal equinox (when the center of the sun is in the same plane as the equator of the earth) at noon (when

*asked by Solar Solar Cells, Fuel Cells and Batteries on November 1, 2013* -
## math

how would you simplify this equation: y = (x+3)/[(4-sqrt(16+h))] please help me! you have three variables. I am not certain "simplify" is an appropriate term here. ohhhh it was my mistake. I meant: y = h/[(4-sqrt(16+h))] y = h/[(4-sqrt(16+h))] rationalize

*asked by kristie on June 30, 2006* -
## Childcare

why is the incubation stage of an illness of concern to day care workers? A children in the stage require a great deal of care and special attention. B children in this stage often need special medical help C children in this stage often pass on the

*asked by Rosa on February 2, 2010* -
## HR

Imagine that you manage a car dealership affiliated with one of the big three U.S. automakers. Given the increasing complexity and variety of today's automobiles, it's impossible to train your mechanics on the details of every potential repair problem.

*asked by Blue on June 24, 2018* -
## Movie review

I have to write a review of a film or play I've seen and I chose "Law Abiding Citizen" I need help (the theme isn't really a theme, its the plot but I can't really come up with a theme.) Could this be it? A man seeks revenge on the justice system for not

*asked by Anonymous on November 21, 2009* -
## Research Paper

WHat do I do if I have a a source but I don't have the authors name and I have to put it in the paper...?understand.? Many internet sources don't list the author. You can use the URL and title of the site. oh ok thank you...so for example: blah blah

*asked by margie on April 15, 2007* -
## trig

An object Is propelled upward at an angle θ, 45° < θ

*asked by Anonymous on February 19, 2013* -
## Statistics

A hotel operates a shuttle bus between the hotel and the airport. The maximum capacity of the hotel’s minivan is 10 passengers. On each trip from the airport, the manager of the hotel conducts the experiment of noting the number of people in the

*asked by tamar on November 17, 2017* -
## Statistics

A recent study was designed to compare smoking habits of young women with those of young men. A random sample of 150 women revealed that 45 smoked. A random sample of 100 men indicated that 25 smoked. At the 0.05 significance level does the evidence show

*asked by Brenna on October 29, 2009* -
## Ed Tech. HELP PLZ ASAP

1.How can you identify the values portrayed in a story? A.by reading old versions B.by reading descriptions C.by focusing on what the character**** thinks,say,and do D.by focusing on the setting of the story 4.Which of the following is true about hidden

*asked by regan on October 27, 2015* -
## Physics Plans Project (11th Grade)

I'm doing a physics project where I have to find plans for a device and then build it and type a report demonstrating the physics behind it. However, the materials can't cost more than $75 total. I'm having trouble finding any plans, especially ones that

*asked by Steve on February 11, 2009* -
## Calculus question

It looks very complicated and I do not know how to even start. Any help would be immensely appreciated. A pendulum has a mass, m, suspended from a rod of length L. At the time t = 0, the pendulum is pulled through an angle θ0 > 0 to the right and given an

*asked by Anonymous on October 7, 2014* -
## physics

Suppose you need to measure the mass of an object, but have only a 7-kg standard mass and a meter stick. Place a knife edge under the 50-cm mark of the meter stick. Then put the 7-kg standard mass at the 39.1-cm mark and place the object so as to balance

*asked by Sami on November 3, 2011* -
## IT

I have asked my teacher for help several times but keep getting pathetic feedback. I will show you first what is expected from the assignment. He says that a five paragraph format is a great way to complete the essay but my paper has three sistuations I

*asked by Jeremy on August 4, 2011* -
## Trig

Find Theta in the degree measure for the indicated quadrant. Show the diagram. cot (Theta)= -(Radical 3/1)in quadrant IV. I got 240 degrees but i don't know how to do the diagram since 240 degrees is in quadrant III. How do you put this in a diagram?

*asked by Lisa on May 10, 2011* -
## algebra

Family on a road trip. travels x miles on day 1. On day 2 they go 52 miles more than three times the number of miles traveled on day 1. The 3rd day they go 83 miles fewer than day 1. write and simplify an expression for the total number of miles traveled.

*asked by stephie on January 19, 2016* -
## Calculus

Let f be a one-to-one function whose inverse function is given by the formula f^(-4)(x)=x^5+2x^3x+1 a. Computer f^-1(1) and f(1) b. computer the value of x such that f(x)=1 C. Computer the value of y such that f^-1(y)=1 Please help me solve this problem.

*asked by Thu on September 28, 2008* -
## Algebra 1

solve if x=student price and y =adult price and 2y + 5x=77 and 2y + 7x=95 what are the price for admission for both adult and child

*asked by connie on March 15, 2012* -
## Calculus

I've done everything I can think of to solve this, but I have no idea. Find the derivative: y = sq rt{11x + sqrt[11x + sqrt(11x)]}

*asked by Kelly on October 7, 2015* -
## Inverse trigonometry

Solve the equation tan^-1(under rootx^2+x)+sin^-1(under rootx^2+x+1)=pi/2 Where tan^-1 inverse of tan

*asked by Ash on April 8, 2018* -
## math

solve if x=student price and y =adult price and 2y + 5x=77 and 2y + 7x=95 what are the price for admission for both adult and child

*asked by connie on March 13, 2012* -
## Algebra II repost

Solve: -x^4 + 200 = 102x^2 -x^4-102x^2+200=0 (-x^2)^2-102(x^2)+200=0 (x^2-51)(x^2+51)(x-20)(x-10) I'm stuck at this point

*asked by Jon on March 2, 2008* -
## Math

Please solve these word problem .chris has three types of watches.20% of his watches are men's watches,40% are ladies' watches and the rest are children's watches.he has 250 watches altogether .how many children's watches does he have?

*asked by Tabassum sultana on February 15, 2019* -
## Physics - Mechanics and Ocsillatory Motion

An 8.70 kg block slides with an initial speed of 1.56 m/s up a ramp inclined at an angle of 28.4 with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.62. Use energy conservation to find the distance the block slides

*asked by Sara on November 10, 2010* -
## chemistry

At 10 degrees C a cannon fires a shell at 1324m/s a) how fast is the shell traveling relative to the soundwave of the explosion? b) how far away from the cannon is the observer how sees the shell pass by 2s before the sound of the explosion arrives? I

*asked by tristan on May 13, 2017* -
## 4th grade math

solve the following problems using pictures, number or words. At president's inaguration in 2013, the newpaper headlines stated there were about 800,000 people in attendance. If the newpaper rounded to the nearest hundred thousand, what is the largest

*asked by Mythreyee on August 30, 2016* -
## chemistry

Formal charge: kind of confused? why cant i get -1? i just want to know if the way im solving it, if its completely wrong. i have a test soon. please help! tinypic . com /view.php?pic=14buuti&s=7 ok in class we did this. and for O FC= 6-4-3=+1 but S FC =

*asked by jessie on February 13, 2011* -
## AP Pysics

You are the lead scientist for a criminal investigation unit. Your team has found what might be the gun that caused the murder.Unfortunately the bullet that identifies the gun can not be found,but there is enough evidence that if you can figure out the

*asked by Keshia on October 25, 2006* -
## Physics

I had posted this question once before, but no one helped me on this one. So I am posting this question again. Suppose the flame of a gas burner stove emits light just like a blackbody. The flame appears blue emiting most of the light at a wave length of

*asked by KatieSc on October 21, 2011* -
## 4th grade math

solve the following problems using pictures, number or words. At president's inaguration in 2005, the newpaper headlines stated there were about 400,000 people in attendance. If the newpaper rounded to the nearest ten thousand, what is the largest number

*asked by Mythreyee on August 30, 2016* -
## Geometry

Crazy hard question I don't get: "A sphere with radius 3 is inscribed in a conical frustum of slant height 10. (The sphere is tangent to both bases and the side of the frustum.) Find the volume of the frustum." I need a proof for this, and I don't know

*asked by Sheenybeany on July 29, 2014* -
## electricity 188

hi my name is christina and i have an electrical question i need help with. i am taking power engineering electrical 188. the question is: how much will ity cost to use 6 lamps of 100 W each if they burn for 5 hours each evening in a month (30 days). the

*asked by christina on February 24, 2008* -
## physics

A jet makes a landing traveling due east with a speed of 100 m/s. If the jet comes to rest in 15.0 s, what is the magnitude and direction of its average acceleration? due west or due east? How can I solve this question? You don't have to give me the answer

*asked by freshmen on October 4, 2012* -
## Science

It has been hypothesized that chloroplasts originate from photosynthetic cyanobacteria that became symbiotic inside a host cell.Which of the following observations provides the strongest evidence for this suggestion. A. Microscopically, chloroplasts appear

*asked by Tessy on January 23, 2016* -
## engineering

Let’s suppose the message x(t) is an analog signal shown in the figure below. a) Draw the block diagrams of the system which converts the analog message signal x(t) to a pulse modulated signal. b) Draw the sampled signal with the sampling frequency

*asked by dioptas on June 6, 2013* -
## Algebra

This is a 3 part question and it is confusing me quite a bit. Please Help! a) A real estate agent trying to sell you a home in a new developement tells you that two floor plans are available. use x for floor plan 1 and y for floor plan 2. in total there

*asked by Laura on August 12, 2008* -
## science

I see others have asked the same question but I do not understand the answers given. Question is to do with zinc solid and dilute sulphuric acid. What substance is left? I see by other posts that Bob Pursley answered this question. I haven't seen his

*asked by teddy on October 15, 2006* -
## Math

Hi. This is my question: An art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with string. What would be the radian measure of the angle between two adjacent pieces of string,

*asked by Ashfia on April 20, 2009* -
## 10th grade Math B

Hi. This is my question: An art student wants to make a string collage by connecting six equally spaced points on the circumference of a circle to its center with string. What would be the radian measure of the angle between two adjacent pieces of string,

*asked by Ashfia on April 20, 2009* -
## physics

About 50,000 years ago, in an area located outside Flagstaff, Arizona, a giant 4.5x10^7 kg meteor fell and struck Earth, leaving a 180 m hole now known as Barrington crater. If the meteor was traveling 20000 m/s upon impact, with what average force did the

*asked by Eric on March 3, 2011* -
## Math

how an I tell if this is a circle or an ellipse? also, how am I supposed to solve it? -x^2+2y^2+8x+3=0 I answered a similar question for Jordan last night at 11:20 divide your equation by -1 to make it start with a positive x^2 term. At this point you

*asked by Darrin on April 4, 2007* -
## Math

The seventh graders sold tickets to their play.the tickets cost $3 for students and $6 for adults. For one performance they sold 79 tickets and collected $375. How many student tickets and how many adult tickets were sold? Write the equation and solve,

*asked by Anonymous on September 10, 2012* -
## com/155

I received my first major credit card at the early age of eighteen. I was positively not ready for that responsibility. Shopping carelessly was not a wise decision. Within six month's, my credit was suffering tremendously. I had already reached my credit

*asked by jackie henton on October 6, 2010*

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