# 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

92,096 questions, page 695-
## Math

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

*asked by Sharon on September 18, 2008* -
## Algebra

Kevin ran 4 miles more than Steve ran. The sum of their distances is 26 miles. How far did Steve run? The domain of the solution is {0, 4, 11, 22}.

*asked by Jd on August 21, 2014* -
## Algebra

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

*asked by Diana on May 27, 2010* -
## maths

the sides of a rectangle are given in centimeters up length 4x+3 down length x+ 6y,left width 3x+1 right width 4x-y. find x and y and area of the rectangle .solution 4x+3=x+6y . y=3x+3÷6 also 4x-y=3x+1.x=y+1

*asked by chimere on May 7, 2015* -
## Chemistry

35.0mL of 0.050 M HCl is titrated with 0.050 M NH3 (Kb= 1.8 x 10^-5). The pH of the analyte solution after 15.0mL addition of NH3 titrant is?

*asked by Eliza on April 11, 2017* -
## Intermediate Algebra

Please Help!! Use the discriminant to determine whether the follow equations have solutions that are: -two different rational solutions -two different irrational solutions -exactly one rational solution or -two different imaginary solutions. 8x^2+7x+3=0

*asked by ladybug on June 13, 2012* -
## Chemistry

What volume of concentrated sulfuric acid (20% weight/weight, density = 1.14) is needed to prepare 1 L of a 0.5 N solution of sulfuric acid?

*asked by Caroline on February 11, 2018* -
## chemistry

How can you separate Ag+, Bi3+, Ni2+ in a solution? I am suppose to make a flow chart... would i use HCL to separate Bi3+ and Ag+ from Ni2+?

*asked by Marie on November 7, 2011* -
## Chem

Determine the concentration of a dioxin solution whose percent absorbance is 0.40% This is the resulting: Absorbance Dioxin 0.64 5.5 0.76 6.3 1.0 8.0 But why can't I figure out the concentration whose percentage is .40%?

*asked by Stacey on March 31, 2010* -
## chemistry

What concentration of the lead ion, Pb^{2+} , must be exceeded to precipitate PbCl2 from a solution that is 1.00 x 10^{-2} M in the chloride ion, Cl^- ? Ksp for lead chloride is 1.17×10−5 .

*asked by Anonymous on December 6, 2012* -
## Math

-x+5 < 1/x+3 The solution manual is my book shows this -x+5 - 1/x+3 < 0 -x^2 + 2x + 14/x + 3 < 0 (x+2.873)(x-4.873)/x+3 < 0 I understand everything except how the (-) sign from the -x^2 in the -x^2 + 2x + 14/x + 3 < 0 step disappeared in the

*asked by Anonymous on January 23, 2018* -
## math

Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.8x2 + 2x + 4 = 0

*asked by carol on May 2, 2011* -
## 5th grade

i need help with my homework! 6 squared---? write the 9 digit number that has, 5 in the tenth place, 6 in the thousands place 3 in the millions place 4 in the hndred-thousands place 9 in the hundreths place. 0 in all the other place. -,---,---.-- also can

*asked by pat on September 8, 2010* -
## math, calculus

Consider the functionf(x)=3x. a. Determine an expression, in terms of a and h, for the average rate of change between the points (a,f(a)) and ( a + h, f(a+h) ) for the function . Show all steps needed to find a simplified algebraic expression. b. Using

*asked by Emma Wallace on April 11, 2019* -
## Math

The following data show the number of Chinese citizens who immigrated to the U.S. Use the data to predict how many Chinese immigrated to the U.S. during the 1990. Decade No. of Chinese Immigrants 1950s 10,000 1960s 35,000 1970s 124,000 1980s 389,000

*asked by Megan on March 29, 2011* -
## math

My son is in Kindergarten and I have no idea about the "Counters" in the question: 1st) Cover the teddy bears in the top row with different-color teddy bear counters. 2nd) Color the teddy bears in the bottom row to show the colors." Help. Thanks You.

*asked by Laura on August 14, 2012* -
## math finance

Consider the N-period binomial model and processes Y0,Y1,...YN and C0,C1,...CN. Suppose that Y is Markov and C is deterministic (i.e., Cn does not depend on the coin flips ù). a) Show: If Cn doesn't equal 0 for all n, then C0Y0,C1Y1,....,CNYN is Markov.

*asked by abdul on March 15, 2012* -
## Math

A solid body consists of a cylinder surmounted by a hemisphere of the same radius. The total length of the body, measured along the central axis of cylinder, is 10cm. If the radius of the hemisphere is xcm,show that the volume vcm^3, of the solid body is

*asked by Prince on October 22, 2017* -
## Physics Help

A falling 50-kg skydiver experiences an upward acceleration of 6.2 m/s2 when she opens her parachute? Show (by calculation) how much drag force is produced by the parachute? How would I calculate this? F(net) = F(drag) - F(gravity) F(drag) = F(net) +

*asked by Alea on April 12, 2016* -
## geometry

Given: AC perpendicular BD and AB congruent CB. Prove AD congruent CD. It is a kite figure. I need statements and reasons. Problem states Plan: prove triangle ABE congruent CBE. The use congruent corresponding parts AE and CE to show right triangle AED

*asked by eric on April 10, 2015* -
## math

Again, I already know this answer... It's 12 but I do not know how to come up with this answer. Plz show me step by step how to come up with the correct answer. My test is tomorrow. Thank you in advance!! A basketball player averaged 20 points a game over

*asked by cindi on February 10, 2015* -
## Calculus

Consider the functionf(x)=3/x. a. Determine an expression, in terms of a and h, for the average rate of change between the points (a,f(a)) and ( a + h, f(a+h) ) for the function . Show all steps needed to find a simplified algebraic expression. b. Using

*asked by Anonymous on November 6, 2018* -
## Math

abe creates a scatter plot showing students ages on the x-axis and their heights on the y-axis. which type of tend will the scatter plot show? A line trend•• A positive trend A negative tend No trend Correct me

*asked by Hey on April 20, 2016* -
## Algebra

I need help, I don't understand this at all! I want to use Orange Juice. So what do I do? Find the hydrogen ion content of a substance of your choice. Using this hydrogen ion content, show how to find the pH of the substance using the formula. Is this

*asked by Cupcake on December 14, 2007* -
## Algebra

The table below represents a linear function f(x) and the equation represents a function g(x): x f(x) −1 −5 0 −1 1 3 g(x) g(x) = 2x − 7 Part A: Write a sentence to compare the slope of the two functions and show the steps you used to determine the

*asked by Anonymous on July 17, 2017* -
## Physics

1. A steam engine converts 150 kg of water completely to steam. The process involves transfer of 4 x 10^8 J as heat. If steam escaping through the safety valve does 2 x 10^8 J of work against outside atmosphere, the net change in the internal energy is: a.

*asked by Isabella on December 21, 2015* -
## P.E

What is a tactic in basketball and how does it work ? The word "tactic" just means a plan or a strategy. http://dictionary.reference.com/search?q=tactic&x=0&y=0 So ... who comes up with plans or strategies or tactics for players to use in a game? Who

*asked by DEBoRAH on September 3, 2006* -
## physics

A body of mass 5.0kg slides from rest down a plane inclined at 30degrees to the horizontal. After sliding 12m down the plane it is found to have a speed of 10m/s. a) How much work has been done in overcoming friction along the plane? b) Calculate the

*asked by sand on June 13, 2012* -
## physics

A black and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distance of 40cm at a steady rate.if the effort is equal to 60N, determine a. The distance moved by the effort b. The work done by the effort in lifting the

*asked by abubakar on March 7, 2015* -
## physics

A 64.9 kg skier coasts up a snow-covered hill that makes an angle of 25.4° with the horizontal. The initial speed of the skier is 8.67 m/s. After coasting a distance of 1.92 m up the slope, the speed of the skier is 4.33 m/s. Calculate the work done by

*asked by Fallon on May 11, 2010* -
## physics

On a frozen pond, a 13.9 kg sled is given a kick that imparts to it an initial speed of v0 = 1.81 m/s. The coefficient of kinetic friction between sled and ice is μk = 0.122. Use the work kinetic energy theorem to find the distance the sled moves before

*asked by taylor on October 6, 2016* -
## Physics (Work Problem)

A 25kg box is pulled across a frictionless floor by a rope that is inclined 30 degrees above horizontal. The tension in the rope is 50N. How much work is done by the force in moving the crate 10 meters? If the box started at rest, what is the final

*asked by James T. on November 12, 2014* -
## physics

A small 2g plastic ball is suspended by a 20 cm long string in a uniform electric field. If the ball is in equilibrium when the string makes a 15 degree angle with the vertical, what is the net charge on the ball? E=10^3 N/c(answer: 5.25x10^-6) Work: I

*asked by Anonymous on February 11, 2008* -
## Honors Chemistry

If 72.4 kJ of heat is supplied to a 752 g block of metal, the temperature of the metal increases by 9.95°C. Calculate the specific heat capacity of the metal in J/g·°C. I cannot find the information in my textbook, and I don't understand the equation

*asked by Elisheva on July 21, 2014* -
## physics

A father pulls his young daughter on a sled with a constant velocity on a level surface through a distance of 10 m, as illustrated below. If the total mass of the sled and the girl is 35 kg and the coefficient of kinetic friction between the sled runners

*asked by Anonymous on April 11, 2010* -
## physics

A 64.9 kg skier coasts up a snow-covered hill that makes an angle of 25.4° with the horizontal. The initial speed of the skier is 8.67 m/s. After coasting a distance of 1.92 m up the slope, the speed of the skier is 4.33 m/s. Calculate the work done by

*asked by Fallon on May 9, 2010* -
## Physics 1

A 64.9 kg skier coasts up a snow-covered hill that makes an angle of 25.4° with the horizontal. The initial speed of the skier is 8.67 m/s. After coasting a distance of 1.92 m up the slope, the speed of the skier is 4.33 m/s. Calculate the work done by

*asked by Fallon on May 5, 2010* -
## physics

On a frozen pond, a 13.2 kg sled is given a kick that imparts to it an initial speed of v0 = 2.48 m/s. The coefficient of kinetic friction between sled and ice is μk = 0.123. Use the work kinetic energy theorem to find the distance the sled moves before

*asked by Joe on February 18, 2012* -
## Physics

On a frozen pond, a 11.7 kg sled is given a kick that imparts to it an initial speed of v0 = 2.01 m/s. The coefficient of kinetic friction between sled and ice is μk = 0.111. Use the work kinetic energy theorem to find the distance the sled moves before

*asked by Anonymous on March 16, 2016* -
## Physics

A 61.8 kg skier coasts up a snow-covered hill that makes an angle of 26.0° with the horizontal. The initial speed of the skier is 6.10 m/s. After coasting a distance of 1.86 m up the slope, the speed of the skier is 4.48 m/s. Calculate the work done by

*asked by Fallon on April 29, 2010* -
## Physics

A 60kg softball player, who is 1.75m tall, performs 12 repetitions of a 140kg squat. If there is a 1m chance from the starting position to the bottom position, how much work is accomplished during the entire set? How much potential energy is stored at the

*asked by ljp33 on August 6, 2013* -
## physics

High-speed stroboscopic photographs show that the head of a golf club of mass 230g is traveling at 56.1m/s just before it strikes a 44.6g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 41.4m/s. Calculate

*asked by faith on October 24, 2017* -
## math

i have this question and im not sure how to do it i keep getting stuck with these types of questions and i would appreciate some help (a) The rate of decay of a radioactive substance, S, is proportional to the amount remaining, x. Given that x = a at time

*asked by jemmy on December 16, 2009* -
## Technology

1. Which of the following is NOT an example of a objective question? A. multiple choice B. essay** C. true/false D. matching 2. Why is it important to recognize the key word in an essay question? A. It will provide the answer in an essay B. It will show

*asked by Laurie on February 9, 2016* -
## Please help me solve this - PreCalc

Use identities to find the exact value of the trigonometric expression below. 1/cos2 * π/16 - 1/cot2 * π/16 PS: in words, the problem is, one divided by cosine-squared, then beside the cosine-square (still in the denominator) is pi/16. Minus one divided

*asked by chizoba on July 25, 2016* -
## Physics

High-speed stroboscopic photographs show that the head of a golf club of mass 231g is traveling at 59.0m/s just before it strikes a 47.1g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 44.3m/s. Calculate

*asked by zhang135 on October 13, 2014* -
## math

find the constant of proportionality and unit rate for the data in the table. Then write the equation to represent the relationship between time t and distance d Time Distance 2 t 90 miles 3 hrs 135 miles 5 hrs 225 miles 6 hrs 270 miles i need to show how

*asked by Natasha on April 4, 2017* -
## Math

Find the area of the triangle with the base 1 2/5 yards and height 5/9 yards. The area of the triangle equals half of the product base and height. The area is ____yd^2 (Type whole number or a simplified fraction) I came up with 35/108 did I do the math

*asked by Denise on August 6, 2013* -
## physics

High-speed stroboscopic photographs show that the head of a golf club of mass 230g is traveling at 56.1m/s just before it strikes a 44.6g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 41.4m/s. Calculate

*asked by lyn on October 24, 2017* -
## physics

High-speed stroboscopic photographs show that the head of a golf club of mass 230g is traveling at 56.1m/s just before it strikes a 44.6g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 41.4m/s. Calculate

*asked by Jelaa on October 24, 2017* -
## Math

I need help on two problems I would like if you went step by step with the problem with me and then let me figure out the answer. If, Tonya and Toya have $15.25 together and Tonya had 25 cents more than Toya, how much does each have? Second question: Bruce

*asked by hip hop chic on August 29, 2005* -
## English

1. Animals give out information and show their feelings in different ways. (What is the meaning of 'give out' here? What other expressions can we use instead of 'give out'? Is it 'distribute'?) 2. Bees dance and tell other bees where to find food. (What is

*asked by rfvv on December 17, 2009* -
## Chemistry

When 0.969 g of CaO is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 397C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. Delta Hrxn, for the reaction of CaO(s) +

*asked by Anonymous on February 24, 2008* -
## college

In acidic solution, nitrous oxide (N2O) reacts with potassium chromate (K2CrO4) to form Cr3+ (aq) and nitric oxide (NO), as products. (i) Produce balanced half-equations to represent the oxidation and the reduction steps. (ii) Generate a final balanced

*asked by gigi on August 8, 2010* -
## Chemistry

Silver ion reacts with excess CN- to form a colorless complex ion,Ag(CN)2 , which has a formation constant Kf = 3.0*10^20 . Calculate the concentration of [Ag] in a solution prepared by mixing equal volumes of 1.8×10−3m NaNO3 and 0.20M NaCN. When I did

*asked by Kris on April 7, 2011* -
## Algebra with Applications

Suppose an insurance agent offers you a policy that will provide you with a yearly income of $150,000 in 25 years. What is the comparable annual salary today, assuming an inflation rate of 4%?. (Round your answer to the nearest cent.) I think I would solve

*asked by Danielle on August 26, 2012* -
## History

As a result of the publications of Bartolomé de Las Casas: A. Amerindian rights were recognized and respected. B. the encomienda system was established. C. Amerindians became more maltreated than before. D. the Spanish government was more attentive to the

*asked by Any on February 6, 2014* -
## Health last questions.

Physical lines of defense include A. skin, cielia, and mucous membranes *** B. hair C. nails D. teeth When a doctor feels for lymph nodes, he is checking for A. inflammation *** B. shrinking C. pain D. sensitivity Your body can get antibodies from A.

*asked by Ann on March 11, 2015* -
## business

For this assignment you are to imagine that you are part of a select marketing group. This select group has been asked to consider the Colorado City Convention and Visitors Bureau survey of 25 hotels in the local area. The survey is concerned with the

*asked by ron on August 2, 2010* -
## Chemistry--help!

Given the equilibrium: HCN(aq) + H2O(l) ←→ H3O+(aq) + CN-(aq) ΔH >0; Ka = 4.0 x10-10 What happens to the concentration of hydrogen cyanide [HCN] when the following stresses are placed on the system at equilibrium? NaCl is added ---> Stays the Same but

*asked by Val on March 9, 2010* -
## Chemistry

1) Frank and Oswalt report a molar absorptivity of 4700 L mol^-1 cm^-1 for thiocyanatoiron(lll) ion. What absorbance would you expect for a soloution that it 1.0e-4 M in thiocyanatorion(lll) ion, if the path length is 1.00 cm? 2) At a given temperature,

*asked by Joe on February 19, 2013* -
## Physics

A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal

*asked by Thomas Samuel Adams on November 21, 2010* -
## Physics

1. A ball is launched from a cliff with an initial velcity of 10 m/s at an angle of 40 degrees above horizontal. If the ball lands 24 m away, determine the height of the cliff. 2. if the mass A is 1 kg and the mass of B is 6.0 kg, determine the

*asked by Liz on June 26, 2014* -
## English

i need ajectives (5), adverbs(5), similie (1), idiom (1), metphor (1) decribing Violet Beauregarde i reli need this i don't have the movie so i cant not watch it and my some of my internet doesnt work soo i cant watch it on youtube or otha sites so can

*asked by Anonymous on April 11, 2007* -
## SS CHECK

2. What is the purpose of the separation of powers? A) to keep ordinary citizens involved in politics B) to prevent any branch from dominating the government C) to distribute work between state and federal levels of government D) to ensure that every

*asked by Katie on November 2, 2016* -
## English

What is the main message that the poem "Africa" suggests about the experience of misplaced Africans around the world? a. They are in danger of forgetting their origins if they do not come together. b. They might be enslaved, but they are strong and moving

*asked by Anonymous on December 5, 2018* -
## motorised gates

Try this website: http://www.howstuffworks.com/ Try different search terms until you find what you're looking for. =) how do they work ? A trick many employ to open and close gates: they use an endless helical drive screw, so the motor turns the screw only

*asked by Writeacher on July 22, 2007* -
## Physics

A med tech student pushes a 30-kg carton of books across the floor of her dormitory by exerting a constant force of 185 N at an angle of 37 degrees with the horizontal. If the opposing force of friction is 70 N, how much work does he do as he moves the

*asked by Paul on February 6, 2012* -
## MATH SUPER URGENT!

Alfonse cuts half a rectangular lawn, 50m by 20m, by mowing strips of equal width around the perimeter. Bart cuts the small rectangle in the middle that's left. How wide a strip does Alfonse cut so that they share the work equally?

*asked by Ibrahem Safieddine on December 2, 2015* -
## chemistry

Dr bob can you help with my last question for tonights home work please A gas mixture consists of equal parts of methane(molecular weight 16.0) and argon (atomic weight40.0). if the partial pressure of argon is 26.6 kPa what is that of methane in the same

*asked by Andy on May 11, 2010* -
## Economics.

What does, "What are two strategies might you employ in order to create and maintain a high demand for stained glass windows. Be sure to consider what would work best for your targeted customer base." mean? NOTE: My targeted customers are: In their middle

*asked by Nicole on October 20, 2013* -
## physics

Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 12 rubs a distance of 7.50 cm each and with a frictional force averaging 30.0 N, what is the temperature increase? The

*asked by Eric on July 19, 2013* -
## Early Childhood

Mrs. Bates watched David work a puzzle that he had chosen from the ones she put on the table. She listened and commented when David made guesses at the correct location for the pieces. This is an example of a/an __________ activity. A. structured B.

*asked by Teresa on March 12, 2014* -
## physics1111

Rubbing your hands together warms them by converting work into thermal energy. If a woman rubs her hands back and forth for a total of 14 rubs a distance of 7.50 cm each and with a frictional force averaging 30.0 N, what is the temperature increase? The

*asked by danny on November 12, 2013* -
## Algebra

Hello ^^ I'm new to this site :0 I was wondering if someone could help me with my schoolwork! I have a bit of a habit of overthinking my work, so I just need it checked by someone to make sure I actually am you know, getting it. The problem is -(5)^-1, and

*asked by Luka on January 31, 2018* -
## English.. Literature... books

can u give me multiple choice questions from the "examview" on the story "A Noiseless Flash" from Hiroshima by John Hersey ... i really need to practice this selection. Plz if u can, copy and paste the questions because the link you might send me would not

*asked by tara on March 11, 2011* -
## Physics

A student eats a dinner containing 8.0x10 raised to power 6j of energy. He wishes to do an equivalent amount of work in a nearby gym by lifting a 60kg object. How many times must he raise the object to expand this much energy? Assume that he raises it a

*asked by Reigna on January 7, 2017* -
## Pre-calculus

A golf ball is hit with an initial velocity of 135 feet per second at an angle of 22 degrees above the horizontal. Will the ball clear a 25 foot wide sand trap whose nearest edge is 300 feet from the golfer? Will be through with all the word problems soon.

*asked by Lucy on October 19, 2008* -
## Chemistry

One of the lines in the spectrum of a mercury vapor lamp has a wave length of 254nm. What is the energy, in kj/mol, of this electro magnetic radiation. The work I have done: (6.626 x 10^-34 x 3.0 x 10^8) all divided by (254 x 10^-9.) The answer I

*asked by Casey on July 11, 2010* -
## sociology

Why did Max Weber fear bureaucracy? He thought it would discourage the growth of capitalism. Bureaucracy dominated individuals with large, impersonal structures. Bureaucracy increased mental health conditions among office workers. Discipline and hard work

*asked by ste on October 7, 2018* -
## Advanced Algebra

Carmela works at a department store and earns $10.45 per hour. She has $33 removed from every paycheck for medical insurance. If her goal is to earn a gross income of $468.60 in one week, which equation will help Carmela determine the number of hours (h)

*asked by Steve on October 10, 2017* -
## Advanced Algebra

Carmela works at a department store and earns $10.45 per hour. She has $33 removed from every paycheck for medical insurance. If her goal is to earn a gross income of $468.60 in one week, which equation will help Carmela determine the number of hours (h)

*asked by Steve on October 10, 2017* -
## 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* -
## terrestrial biomes

The main characteristics used in naming terrestrial biomes are?? Please check this site out. I'm sure you'll figure out these main characteristics. http://www.factmonster.com/ipka/A0769052.html 4. Cigarette smoke has been found to have the following

*asked by katrina! on August 12, 2006* -
## Accounting

You have recently been employed by a large retail chain that sells sporting goods. One of your tasks is to help prepare financial statements for external distribution. The chain's largest creditor, National Savings & Loan, requires that financial

*asked by Nirav on October 2, 2011* -
## Chemistry

Givien a 2.0kg solution of phosphoric acid and water 53% phosphoric acid by mass calculate the number of moles of phosphoric acid

*asked by Anonymous on October 14, 2011* -
## Chemistry

Givien a 2.0kg solution of phosphoric acid and water 53% phosphoric acid by mass calculate the number of moles of phosphoric acid

*asked by Anonymous on October 14, 2011* -
## math

use the names and ages of yourself and the other two people you selected. Make sure one is older than you and one is younger than you. In years, how old was the older person when you were born? Write an equation that models how old in years each of you

*asked by king on November 24, 2011* -
## chemistry

This is what it says on his website. Look at the posts from 06/28/10 to 07/07/10, but specifically look at 07/07/10. Our test that we took was our midterm. Sorry to keep bothering you. I just want to prove that I am not taking a take home exam :)

*asked by G on July 7, 2010* -
## math - question

In a television game show, there are five questions to answer. Each question is worth twice as much as the previous question. If the last question was worth $6400, what was the first question worth? is the answer 400

*asked by anonymous on May 12, 2009* -
## Chemistry college

You are given a recipe for a buffer that contains 5% (w/v) MgSO4.7H2O. However, you only have MgSO4 anhydrous available to you. How much MgSO4 anhydrous do you need to make 0.5L of the buffer with the same molar concentration as in the recipe? Show your

*asked by Anna on September 16, 2015* -
## chemistry

Show calculation setups and answers for the following problems. a. convert 21 C Celsius to degrees Fahrenheit. b. convert 101 F Fahrenheit to degrees Celsius. c. convert 15 nm into km.

*asked by CeeCee on February 11, 2014* -
## math

john has horses and chickens he has 3 less chickens than horses, if you count the total number of legs for chickens and horses you will get 24 how many chickens does john have? answer pls and show how did you get it thanks

*asked by zar on October 27, 2016* -
## Maths

We have Rs.100/-.If we spend Rs.100/-and balance is Rs.102/-,show how is Rs.2/-extra Spent Balance Day 1 Rs 40 Rs 60 Day 2 Rs 30 Rs 30 Day 3 Rs 18 Rs 12 Day 4 Rs 12 Rs 00 -------- -------- Total Rs 100 Rs102......?

*asked by Sam on February 28, 2016* -
## Math

Can someone explain this question? For a set of scores, will the interquartile range always be less than the range? Explain your answer with an example. My answer would be yes the interquartile will always be less than the range.Is this correct? But I

*asked by B.B. on July 29, 2009* -
## math

IF E IS THE SET{1,2,3,?...19,20}and A,B,AND C ARE SUB SET OF E SUCH THAT A={multiple of five},B={multiple of four},C {multiple of three}.list the element of A,B,C?B.findANB,ANC,BUC,?C. using your result in B show that(AUB)U(ANC)=AN(BUC)?

*asked by favour on December 3, 2018* -
## 8th grade math

Kenisha sells athletic shoes part-time at a department store. She can either earn $500 per month plus a 4% commission on her total sales or $400 per month plus a 5% commission on total sales. A)write a system of equations to represent the situation. B)what

*asked by jessica on April 28, 2010* -
## Chemistry

Suppose you use 135 calories of energy to perform a task, how many joules have you used? See, I don't want the answer, just the steps leading me up to the answer, like how to figure this problem out wiht out using a coverting system. Assuming you are using

*asked by Buttercup on September 24, 2006* -
## science

In the system shown in the figure , block A has mass m_A = 2.08 kg, block B has mass m_B = 0.370 kg, and the rope connecting them has a nonzero mass 0.203 kg. The rope has a total length 1.03 m and the pulley has a very small radius. Let d be the length of

*asked by Will on January 18, 2011* -
## Pre-Calc

I have two questions how do you solve cos x=sqrt2-cosx on the interval of [0,2pi) and how do you verify sin^2(theta)/1-cos(theta)=1+cos(theta) without negating it to equal 1?

*asked by Daniel on November 14, 2010*

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