# 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 614-
## Math - Trig

Hi I have a Trig question that i don't understand, can someone please explain how to solve for it using cosine law?? A Clock with a radius of 15 cm has an 11 cm minute hand and a 7 cm hour hand. How far apart, to the nearest centimetre, are the tips of the

*asked by Mark on April 30, 2008* -
## history

What did the new theme is an American are in need of her signify? Continued reliance on European influence **Development of a uniquely American perspective** A renewed interest in religion I believe the technological advancements would solve humanity's

*asked by champagnepapi on March 1, 2017* -
## Critical Thinking/Ethics

A worker came to the employer and admitted to stealing money from the firm for personal use. What could the employer do now (to regain lost revenue, employee loyalty, corporate image, etc.)? (List 3 ways to solve this problem)

*asked by Steph on October 8, 2012* -
## Math

The average size 8 shoe is approximately 8 1/2 inches plus or minus a quarter of an inch . Write and solve an absolute value inequality that shows the range of possible lengths of a person'a foot that would wear a size 8.

*asked by Anonymous on January 27, 2015* -
## Science, Example PLZ?

Using an example, explain how being able to understand scientific principles and think scientifically can help you solve problems and answer questions in your everyday life. Have Any Example? I Sure Dont Have Any... Can You Give Me An Example Or Two Since

*asked by Algalla on September 12, 2017* -
## Calculus

A particle moves along line segments from the origin to the points (3, 0, 0), (3, 3, 1), (0, 3, 1), and back to the origin under the influence of the force field F(x, y, z) = z2i + 5xyj + 4y2k. I have tried multiple times to solve this problem but the

*asked by Katie on December 8, 2014* -
## Math help please

Sorreh I never really post question but I need help with this Write a real world problem that you can model with the two step equation 5x+7=10. Then solve the problem. I would really like it if Some one could explain this to me!! thanks agian ~lost gurls

*asked by Thili on November 18, 2016* -
## Algebra 2: Sequences and Series

I have this question and I don't understand what it's asking for. It says evaluate, is it asking for the missing term or what? The sequence 21, 23, 25, 27, 29, ..., 41 has 11 terms. Evaluate the related series. * 320 * 341 * 300 * 166 Very confused, any

*asked by Skye on April 3, 2010* -
## math

The radius of a cylinder is 3.5 ft. The height is 14 ft. Find the surface area and volume of the cylinder to the nearest tenth of a foot. can someone givve me a link to a video to help solve for these things? im lost but i dont want answers.

*asked by hello random person on May 15, 2019* -
## Math Probability

A math class has 20 students who choose a topic from a list for an essay. How big pool is necessary for the probability of at least one duplicate to drop below fifty percent? I understand it is like the birthday problem, I just do not understand how to

*asked by Matt on February 9, 2012* -
## Statistics

For Mathguru_ from statistic question on Tuesday April 10, 2007 follow up question- what if I wasn't given the standard deviation either- how would I solve this problem Other tutors can help, but without the previous information, it is impossible to help

*asked by Angel on April 11, 2007* -
## Math

In evening my test plz help me to solve it A room length 3m,20m wide and 6m height. Find the floor is to be tiled.if each tile measures 60cm*50cm,find the no. Of tiles required.

*asked by Simon on February 6, 2013* -
## algebra 2

Solve the problem. The growth in the population of a certain rodent at a dump site fits the exponential function A(t)= 164e0.032t, where t is the number of years since 1975. Estimate the population in the year 2000.

*asked by re on July 12, 2011* -
## MATH

24/(x+1) + 12/(4-x) = 14 Multiply both sides by (4-x)(x+1) 24(4-x) + 12(x+1) = 14(4-x)(x+1) 96 - 12x + 12 = -14(x^2 -3x -4) = -14x^2 +42 x +56 Combine terms and solve for x. sorry guys, here's another.I'm not the greatest at math but i do know some... The

*asked by drwls on January 17, 2007* -
## Math Help

The average size 8 shoe is approximately 8 1/2 inches plus or minus a quarter of an inch . Write and solve an absolute value inequality that shows the range of possible lengths of a person'a foot that would wear a size 8.

*asked by Rian on January 27, 2015* -
## physics check

A straight line 1.8m long carries a current of 13A and make an angle of 15º with a uniform magnetic field B=1.5T Calculate the magnetic force on the wire. Do we use F=I×L×B×sin in order to solve or no

*asked by angy on May 31, 2016* -
## algebra 1A

why does the inequality sign change when both sides are multiplied or dived by a negative number? Does this happen with equations? why or why not? write an inequality & solve it use both the multiplication & addition properties of inequalities. Thnk you. I

*asked by Anonymous 2 on September 28, 2009* -
## science?

Why would a potato cook faster if you poke holes in it with a fork before microwaving it? ~My thinking is that it would increase the surface area..but this could be just partially why it cooks faster. Thank You =D I don't know in a microwave it cooks

*asked by ~christina~ on August 21, 2007* -
## maths

a bag contains 10 marbles of which 2 are red and 8 are black.Bag B contains 12 marbles of which 4 are ed and 8 are black.A ball is drawn at random from each bag. 5.1 draw a probability tree diagram to show possible outcome

*asked by dimpho on August 25, 2015* -
## algebra-linear equations

The combined cost of one advance ticket and one same-day ticket to a show was $50. It is known that 35 tickets were sold in advance and 25 the same day, for total receipts of $1600 . What was the price of each kind of ticket?

*asked by rachel on November 10, 2009* -
## math

if a 13 by 9 inch brownie pan is divided into 20 equal size brownines, what are the dimensions of one brownie? Divide 13 by 5, and 9 by 4 To get the dimensions. 13 divided by 5 is 2 3/5 9 divided by 4 is 21/4 please explain or show equation in fractions

*asked by kyle on November 29, 2006* -
## Physics

Sophia exerts a steady 40-N horizontal force on a 8-kg box resting on a lab bench. The box slides against a horizontal friction force of 24 N. Show that the box accelerates at 2 m/s2.

*asked by Cassie on April 21, 2013* -
## math

It has been determined that 30% of students at a certain high school own a cell phone. If 95 students are randomly selected determine the probability that exactly 20 students own a cell phone. *if using a calculator show syntax used*

*asked by corey on May 23, 2011* -
## math

Mr.Cohen drives 84 2/10 miles. on Tuesday, 84 6/10 miles on Wednesday, and 85 miles on Thursday. part A what is the rule for the distance Mr.Cohen drives each day? show how you can check your answer.

*asked by harleen kaur on January 21, 2019* -
## Math

Lisa looked at a group of even numbers. The numbers were 4, 8, 48, and 64. She made a generalization that all even numbers can be divided by 4. Which number below could you use to show weather Lisa's generalization is correct or incorrect. A. 18 B. 28 C.

*asked by CanYouHelpMe on March 7, 2017* -
## Chemistry

A chemist conducted a recrystallization on 18.5 g of a solid and collected 12.5 g from the first, and 2.7 g from the second recrystallization. Show your calculation and answer the following questions: What is the percent recovery in the first

*asked by david on September 20, 2012* -
## physics

Sophia exerts a steady 40-N horizontal force on a 8-kg box resting on a lab bench. The box slides against a horizontal friction force of 24 N. Show that the box accelerates at 2 m/s2.

*asked by Cassie on April 21, 2013* -
## Chemistry

If 64.0 g of H2O are actually obtained, find the actual yield %. Show that the % the same whether you calculate using grams or moles. Theoretical yield is 4.04 moles and in grams is 72.80 grams 2H2 + 1O2=2H2O

*asked by Feather on September 14, 2014* -
## physical science

Sophia exerts a steady 40-N horizontal force on a 8-kg box resting on a lab bench. The box slides against a horizontal friction force of 24 N. Show that the box accelerates at 2 m/s2.

*asked by alex on November 9, 2014* -
## science

Read the scenario. A cyclist starts at a position of 0 m and takes 3 s to move east to a position of +8 m. He then cycles west to a position of +5 m which takes an additional 2 s. What is the cyclist’s displacement? - 8 m +5 m -5 m +11 m can someone show

*asked by dianni on January 3, 2019* -
## Science Physics

*asked by Peg on May 17, 2014* -
## biology

a woman whose father had hemophilia and whose mother was normal married a man whose father did not have hemophilia but whose mother did . if the couple's first child was a son what are the chances that he would show the trait of hemophilia?

*asked by gwen on June 19, 2013* -
## Mathematics

Eggs cost 90 cents a dozen. Peppers cost 20 cents each An omelette consist of 3 eggs and a quarter pepper what is the cost of ingredients for 8 omelets SHOW ALL WORKING

*asked by Ashley-ann on November 17, 2009* -
## chemistry

Sixteen electrons are present in the Lewis structure of which of the following molecules? CO2 N2O SO2 more than one correct response no correct response If more than one correct response please show all correct answers thank

*asked by Johnny on February 23, 2014* -
## physics(please help)

a planet orbits a star with period T. As seen from that planet the star's diameter subtends an angle of theta radians. Show the density of the star is given by rou=24pi/G(T^2)theta^3 please help!!!

*asked by POD on April 7, 2008* -
## Math

Azuri has 4 cartoons with 2/3 liter of orange juice in each cartoon. She recorded this expression to show how much juice she had in the cartoons: 4x2/3. She poured the juice into glasses with 1/3 liter in each glass.

*asked by Orene on April 6, 2017* -
## Chemistry

I think I have the answer to this question but need some help! Display the final answer in correct scientific notation and show correct number of significant figures in the final answer: 6.0223010000 x 10-24 x 2.222090001 x 10-30

*asked by Susan on February 22, 2012* -
## Math

A strand of lights has 50 light bulbs. Eight bulbs are burned out. Write the ratio of total number to the bulbs that are burned out.show this ratio all 3 ways, in simpliest form.

*asked by Amy on January 20, 2016* -
## Math

The base of a hill is -30 feet below sea level .,The top of the hill is 200 feet higher .What is the elevation of the top of the hill . Plz show me how to get the answer its confusing

*asked by Rian on September 1, 2014* -
## Statistic

Heights of adult men have a mean of 69.0 inches and a standard deviation of 2.8 inches. Approximately what percentage of adult men have a height between 66.2 and 77.4 inches? Must show the number and the empirical rule

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

A block of mass m = 3.65 kg is attached to a spring (k = 27.5 N/m) by a rope that hangs over a pulley of mass M = 7.30 kg and radius R = 2.81 cm, as shown in the figure. a) Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of

*asked by Kyle on October 31, 2014* -
## physics

A block of mass m = 2.67 kg is attached to a spring (k = 32.3 N/m) by a rope that hangs over a pulley of mass M = 5.34 kg and radius R = 6.41 cm, as shown in the figure. a) Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of

*asked by toot on March 30, 2011* -
## math

Two ships pursue straight-line courses at steady speeds. At each time t (in hours, where 0 less-than-or-equal t less-than-or-equal 14), the positions of the two ships are given by: Ship A (10t+35, 20t+25) Ship B (11t+15, 22t+15) These coordinates are with

*asked by s17 on November 18, 2016* -
## physics

the tallest volcano in the solar system I the 23 km tall Martian volcano, Olympus Mons. An astronaut drops a ball off the rim of the crater and that he fee fall acceleration of the ball remains constant throughout he ball's 23 km fall at a value of 3.3

*asked by luma on September 21, 2015* -
## Math

A farmer was taking her eggs but they all fell on the floor. She didn't know how many eggs she had. But then she remembers when she put them in groups of two, there was one egg left over. When she put them in groups of three, there was also one egg left

*asked by Sam on September 16, 2006* -
## math

Tiffany worked 9 1/5 hours on Monday and 10 1/4 hours on Tuesday ... how many hours did she work on those two day???

*asked by Anonymous on June 14, 2012* -
## math

Juan's father is 4 times as old as Juan.Twenty-two years from now he will be twice as old as Juan.What are their ages now? My work- 4(F)=J 22(2)=J

*asked by Gigi on February 6, 2016* -
## Math

How would I simplify this quadratic equation: y=-15/20.25(x^2+3x+2.25)+0 This is my work already done the original equation I was given but I need help simplifying the equation I have found.

*asked by Alex on December 8, 2014* -
## Physics

A spring has a spring constant of 42 N/m. How much work is required to stretch the spring 1.5 cm from its equilibrium position?

*asked by Kels on October 4, 2011* -
## Math

Roger knows how many keys a piano has. He knows that some of the keys are broken. How can he find the number of keys that work

*asked by Ryan on September 18, 2012* -
## math

suppose the graph of f is given . Describe how the graph of the function can be obtained from the graph of f . Y = 4f ( x + 5 )- 3 . How would I work this problem?

*asked by 758 on December 15, 2007* -
## MATH HELP

You have 33 dogs and 4 kennels. Divide the dogs up evenly so the same number of dogs is in each kennel. Help please. Not how to work it out. Thank you.

*asked by MATH HELP PLEASE on September 14, 2011* -
## PLease Help Me IN Math

Problem: 25-x^2 6 ------ * --- 12 5-x What I Got: 5-x --- 2 *Please Check My Work And Tell Me If I am Correct or wrong.If I am wrong please help me as much as possible.Thank you~ Wrong. When are you going to factor the 25-x^2 ? The 5-x then will divide

*asked by Margie on February 26, 2007* -
## Math

Roger knows how many keys a piano has. He knows that some of the keys are broken. How can he find the number of keys that work?

*asked by Justin on January 23, 2013* -
## Math

Max worked for 3 3/4 hours on Monday and six and a half hours on Tuesday. did he work more or less than 10 hours?😀

*asked by Cutie pie on August 1, 2016* -
## Statistics

The method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal distribution. 1320 1201 1257 1180 1268 1316 1275 1317 1275 (a) Use a calculator with mean

*asked by Interval Estimate on April 11, 2015* -
## history

How was the Roman Empire’s system of government similar to many of today’s Western European governments? Roman rulers were appointed based on their heredity and noble blood lines. Only the free, adult Roman male citizens were allowed to vote. Rome

*asked by i need help!!! on September 22, 2018* -
## history

How was the Roman Empire’s system of government similar to many of today’s Western European governments? Roman rulers were appointed based on their heredity and noble blood lines. Only the free, adult Roman male citizens were allowed to vote. Rome

*asked by malia on September 21, 2018* -
## History

Read the sentence. Nicholas Copernicus is best known for publishing works on his deathbed that discussed __________. Which most accurately completes the sentence? heliocentric theory and planetary orbits, including the orbit of the earth moon string

*asked by malia on November 2, 2017* -
## History

How was the Roman Empire’s system of government similar to many of today’s Western European governments? Rome established civil law that detailed citizens’ rights and the legal process. Roman Senators were appointed based on their wealth and class.

*asked by Victoria on July 24, 2019* -
## college math

13. (4 pts) At an annual flower show, 6 different entries are to be arranged in a row. a) How many different arrangements of the entries are possible? b) If the owners of the 1st, 2nd, and 3rd place entries will be awarded prizes of $100, $50, and $25

*asked by Rose on December 12, 2007* -
## Physics

I'm not sure how to calculate this question help me! (Grade 11 Physics) it's sound intensity... Show me how to do it please! (textbook says answer is 3.5 m) At close proximity, rustling leaves have a sound intensity of about 1.2 x 10^-11 W/m squared. At

*asked by Chris on November 25, 2009* -
## science help!!!!!!!!!

You are creating a carbon cycle poster. In which direction would you draw arrows to show the movement of carbon through the process of resperation? A.from the rocks to the air B.from the rock to the grass C.from the air the wolf D.from the wolf to the air

*asked by butterfly on November 6, 2014* -
## What study would be the best? Help with Psychology

What is the best kind of study to conduct when wanting to show that Variable X has a direct effect on Variable Y? The answer choices I am given are experiment, survey, observational study, non experimental study. I think the right choice would be an

*asked by Mariya on January 27, 2015* -
## math

Robert spins the spinner and rolls a standard number cube. Find the probability that the spinner will stop on purple and the cube will show a six. The spinner has six equal slices, 1 purple, 3 green, 1 yellow, 1 red.

*asked by Jon on April 11, 2017* -
## Mathematics

A motorist do does the first part of his journey at an average speed of 54km/h. Then he increases the speed to 60km/h for the rest of the journey. If he travels 225km in 4 hours, what is the distance traveled for the rest of his journey? show clear steps.

*asked by Fatima on March 7, 2012* -
## english: greek mythology

In the story Prometheus (he steals fire and gives it to humans), What human qualities do Prometheus and Zeus have? What is the significance of these gods having human qualities? please just point out a few qualities for each and some quotes that show

*asked by Rose on December 16, 2010* -
## English

Could you paraphrase this sentence for me? His wish was to keep his country's independence from the United States. It's best if YOU do the paraphrase and then post what you write. Someone here will give you feedback. To paraphrase, cover the sentence and

*asked by Vanssa on December 9, 2006* -
## Physics

In the outer space, a constant force is applied to a 32.5 kg probe initially at rest. The probe moves a distance of 100 m in 10 s. Could some one show me the step to step on how to find (a) What acceleration does this force produce? (b) What is the

*asked by Jada on October 5, 2018* -
## Organic Chemistry

2-methyl-2hexanol is reacted with sulfuric acid at around 800C. The two products formed are 2-methyl-1-hexene (19%) and 2-methyl-2-hexene (81%). Show the chemical equation for this reaction. Explain fully why 2-methyl-2-hexene is the major product. Please

*asked by Deon on October 14, 2010* -
## Math

A rectangle is 12in longer than it is wide. The perimeter is 68m. Write an equation and show steps to find its length and width. I need help figuring out what the equation would be. I found out that the length is 23 in and the width is 11 in, but I can't

*asked by Anonymous on January 23, 2019* -
## mtah problem

the girls gym teacher needs to purchase 15 softballs, 5 package of tennis balls and two soccer balls.she plans to collect $1 from each of her students to help pay for balls.write and evaluate an expression to show how much more the teacher will have to

*asked by morgan on January 13, 2009* -
## Business Communication 1

11. If an audience is opposed to what you have to say or resistant to a change you are suggesting, a good approach is to: be as ambiguous as possible to avoid offending the members of the audience. begin the message with something both you and the audience

*asked by Jimmy Zanes on September 30, 2010* -
## computers

Which of the following operating system types is used in medical equipment or a cash register? (Points: 5) a. multi-user/multi-tasking b. real time c. single-user/multi tasking d. single user/single tasking is it A

*asked by john on November 7, 2011* -
## solving Equations

Solve x square pluse 5x subtracting by 6 equals zero? X^2 + 5x - 6 = 0 Solve by factoring. 3 and 2 will do it. heres the right answer.... (x-1)(x+6)=0 x=1 x=-6 Let's see if that is the right answer. The first number is the product of the first two numbers;

*asked by shanna on October 17, 2006* -
## Ions & Atoms-Lab Part 2

For those who haven't seen my previous post; I request you to go and search for it, it says Lab part 1 on it. You will not know what I'm asking about, if you don't read it it. Overall nothing will make sense. Thank you very much for all your help. These

*asked by Sara on April 19, 2010* -
## Microeconomics

As part of their chores on Saturday mornings, they have to clean the bathrooms and wash the floors of the house while their parents go grocery shopping. In one hour’s time, Mike can clean two bathrooms or wash six floors. Linda, on the other hand, can

*asked by jill on November 14, 2010* -
## pHysics !!

A 20-g bullet is fired horizontally into a 980 g block of wood suspended by a long cord. The bullet sticks in the block and causes the block to swing 15 cm above its initial level. a) What is the momentum of the bullet before it hit the block? b) Determine

*asked by kent on September 1, 2013* -
## Percentages: Oops, one more thing

Forgot to mention that the exams are each 10%. It's 40% because he had 4 exams. math problem: pedro wants to calculate his gpa. he has the lab grades:90/100,98/100,90/100,94/100,90/100,90/100,95/100,98/100. Labs are worth 20%. He has the test grades:

*asked by day on December 5, 2006* -
## History

1. Which group most directly influenced the maya and the Aztec? A: Mexican B.moche C.olmec * D.puebloan 2.Which of the following are evidence that one civilization had a large influence on both the Maya and the Aztec? Select all that apply. (3 are correct)

*asked by Jam on September 24, 2016* -
## English1A-Critical Thinking and Writing

I need to write a 7 page essay and I need some ideas for my paper so I could think of a thesis. I wrote a paper earlier on Gender roles, I'm not sure who helped me, but it is similar to this except this one is a research paper. I need at least 7 sources.

*asked by Kuromi on November 10, 2009* -
## Statistics

Why would one not be surprised that when students were asked how many minutes they studied on a typical weeknight, most responses are in multiples of ten minutes???? This question seems to be more about psychology than statistics. Most people don't recall

*asked by Kayse on August 4, 2007* -
## Physics

The Cyclotron lab is not really designed to handle radioactive beams, but Briggsium is too weird to ignore. The physicists propose to generate it in a nuclear reaction immediately behind the accelerators, and are trying to see if they can get the beam all

*asked by Nadya on April 24, 2011* -
## Physics

Two disks of identical mass but different radii (r and 2r) are spinning on frictionless bearings at the same angular speed ω0, but in opposite directions. The two disks are brought slowly together. The resulting frictional force between the surfaces

*asked by Kayla on November 19, 2011* -
## chemistry

the vapor pressure of water at 45.0 °c is 71.93 mmhg. Calculate the vapor pressure of a solution of 1.50 m Al(NO3)3 at this temperature (assume 100% dissociation)

*asked by michael on July 16, 2013* -
## Chemistry

Need some direction.. where do I start? Vinegar is a 5% (mass/mass) solution of acetic acid in water. If vinegar has a density of 1.06 g/mL, what is the concentration in molar?

*asked by Mike on April 25, 2015* -
## Chemistry 104

What is the percent ionization of a solution prepared by dissolving 0.0286 mol of chloroacetic acid in 1.60 L of water? For chloroacetic acid ,Ka=1.4x10^-3

*asked by Chemistry on March 19, 2013* -
## Chemistry

What is the concentration of CO3^-2 in a 0.028M solution of carbonic acid, H2CO3? For carbonic acid, Ka1=4.2x10^-7 and Ka2=4.8x10^-11

*asked by B on March 19, 2013* -
## chemistry 2

What is the molality of a solution that has 80 grams of Benzoic Acid dissolved in 400 mL of ethanol. The density of ethanol is .789 grams/moles

*asked by MICHELLE on November 11, 2010* -
## chemistry

what is the molecular mass of a solute if a solution containing 150 g of that solute and 1.0 kg of water has a boiling point of 102.0 degree c? (Kb= 0.512 degree C/m)

*asked by dj on November 28, 2010* -
## chem/solubility

the Ksp of CaF2 = 1.46*10^-10 and Ka of HF = 3.5*10^-4 Calculate the pH of a solution in which the solubility of CaF2 = .0100 moles/liter. so Ksp =[Ca2+][F-]^2 and Ka =[H3O+][F-]/[HF] I'm not sure how to continue...

*asked by Natash on May 13, 2009* -
## science

if solubility of ammonium chloride is 55 at 60 degree celsius,.What is the amount of ammonium chloride dissolved in 40 gram of saturated solution at that temperature ?

*asked by sameera on February 25, 2013* -
## science

Stomach acid has a pH of about 2. What conclusion can you reach about the pH of an antacid solution that is used to neutralize excess stomach acid? Use Figure 8-3 to answer this question.

*asked by Anonymous on December 9, 2009* -
## 4th grade math

Please help advise if my answer is correct Is the solution of 25 + n = 30 greater or less than 30? Explain how you know without solving it? By looking at the equation, I know that the value of the n = would be 5. It is not greater or less. It should be

*asked by Zack on October 25, 2011* -
## Chemistry

A solution of vinegar is 5.16% by mass aetic acid, CH3CO2H, in water. Assuming the density of vinegar is 1.00 g/mL, what is the molarity of the acetic acid?

*asked by Missy on October 18, 2010* -
## Chemistry

Concentrated hydrochloric acid has a concentration of 12.1 moles per liter. how many milliliters of the concentrated acid should be used to create 3.25L of a 0.100M solution?

*asked by Lindsey on May 20, 2012* -
## Chemistry

A solution containing 0.100 mol of Na2CO3 and 0.100 mol of NiCl2 is allowed to react. What mass of precipitate forms in this reaction?

*asked by Eagertolearn on February 23, 2013* -
## chemistry

What is the final volume of NaOH solution prepared from 250.0mL of 0.800M NaOH if you wanted the final concentration to be 0.200M

*asked by jerome on November 12, 2013* -
## Chemistry

An aqueous solution of an unknown, monobasic weak base has an initial molarity of .176 M and a final[OH-] of .0000158 M. What is the Kb of the unknown base?

*asked by Natalie on December 8, 2010* -
## MATH

hmm...i need help on this problem, anyone know how to o this? (if u can, put a step-by-step solution) i would really be grateful. the coordinates of two points are A(-2,6) and B(9,3). find the coordinates of the point C on the X-axis so that AC=BC

*asked by jacob on December 7, 2008*

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