# 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 249-
## mat116

Graph the system of inequalities: x+3y or= 0

*asked by Suzanne on November 16, 2010* -
## ENDOCIRNE SYSTEM

HOW ENDOCRINE SYSTEM FUNCTION

*asked by ALEJANDRO on September 13, 2011* -
## Algebra

Graphing the system of inequalities. y>= -5 x>= 6

*asked by Tina on October 10, 2009* -
## math

Evaluate (3 + 4) + 1 in the mod 5 system

*asked by mike on November 14, 2010* -
## science

What is the definition of "Organ System"?

*asked by Erin on January 20, 2011* -
## Algebra

1. I need help solving the system by substitution -x-y-z=-8 -4x+4y+5z=7 2x+2z=4

*asked by Samantha on October 9, 2017* -
## IT

why is system Burn-in important?

*asked by michael on May 15, 2016* -
## math116

What does it mean for a system to be consistent or inconsistent?

*asked by Anonymous on March 19, 2010* -
## science

this system gives the body its shape

*asked by monesh on October 5, 2017* -
## Algebra 2

Complete the system for no possible solutions: x+y+z = 7 y+z = ? y+z=?

*asked by BC on October 14, 2010* -
## English

Other people said they had invented the system.

*asked by Leslie on December 17, 2018* -
## World History

What is the basis of the feudal system?

*asked by Losa on October 24, 2012* -
## math

Conversions in the Metric System

*asked by Anonymous on March 14, 2017* -
## Informaton Technology

Why is system Burn-in important?

*asked by Sherzz on May 14, 2016* -
## Chemistry

Find the pH of mixture of acids. 0.185 M in HCHO2 and 0.225 M in HC2H3O2 Im using an ice chart of weak acid and putting in strong acid in H+ initiAL concentration. I've done the problems many different ways but cannot seem to get the right answer help

*asked by L.Bianchessi on February 26, 2012* -
## physics

A horizontal spring attached to a wall has a force constant of 800 N/m. A block of mass 1.10 kg is attached to the spring and oscillates freely on a horizontal, frictionless surface as in the figure below. The initial goal of this problem is to find the

*asked by Anonymous on September 27, 2011* -
## math

Percents Unit Test 1. Write a ratio and a percent for the shaded area. (1 point) , 25% , 31.25% , 20% , 25% 2. Model 25% on a grid. (1 point) 3. Write the ratio as a percent. In the small country of Varia, a bill becomes law only if

*asked by Fun on June 21, 2018* -
## Chemistry

Can someone please explain how to do this problem? I am really confused. Thank you. 3. How much heat does 32.0 grams of water absorb when it is heated from 25.0 degrees Celsius to 80.0 degrees Celsius? q = mass*specific heat water*(Tfinal-Tinitial) = ??.

*asked by Amy on July 19, 2007* -
## physics

If 80% of a piece of wood is submerged in water before oil is added, find the fraction submjerged when oil with a density of 781 kg/m^3 covers the block. (Don't neglect the buoyant force of air before the oil is added). I thought to find the density of

*asked by tmaria on June 19, 2007* -
## PHYSICS

Identify the following gas compression descriptions as adiabatic, isothermal or isobaric. a. As the gas compresses, the internal energy ÄU, decreases when the temperature decreases; the work done on the gas is greater than the heat removed from the gas:

*asked by GRISSELL on March 3, 2012* -
## physics

Answer the following question:Be sure to show all work. Include formulae and units.Be sure to include relavant, meaningful diagram and a complete circuit diagram with circuit related problem. take enough space, don't try to squeeze everything on a small

*asked by titu on April 17, 2015* -
## college algebra

4. The yearly cost T, in thousands of dollars, of tuition and required fees at a private college (includes two- and four-year schools and does not include room and board) can be approximated by T= 3/5n + 5 where n is the number of years since 1985. That

*asked by Kim on May 9, 2010* -
## Chemistry

1. A bottle of juice at room temperature is placed in a bucket of ice inside a box. The box, bottle, and bucket of ice represent a closed system. Which of the following statements is true? (2.0 points) (Points : 2) Heat flows from the ice to the juice

*asked by jeje on March 14, 2011* -
## english

Choose and Place MLA, APA, or Both in the blank. _____1. In a work with a single author, the author’s last name and initials are listed in the works cited entries. _____2. In a work with a single author, the author’s full last name and first name are

*asked by john on April 8, 2012* -
## Unit 4 - Memory, Thinking, and Intelligence

research Spearman's Model of Intelligence and Gardner's Multiple Intelligences. Based on your findings, compare and contrast the two models. Provide several comparisons and several contrasts. Which of the two models do you feel is more in line with

*asked by candy on September 21, 2006* -
## chemistry

I need help on these questions. They all seem pretty similar i think? i don't know what formula i am suppose to use. And what does nonvolatile mean? is that like a clue or something? 1) 2.6 g of the nonvolatile solute sucrose (C12H22O11) is added to 465 g

*asked by confusedkid on January 24, 2009* -
## spanish

Can you please help me with my spanish homework :? ~.~.~.~.~.~. I did most of it,but I'm stuck on a few,so please help :) ~.~.~.~.~.~. You are a contestant on a game show. The host of the show has given you these answers. Write the corresponding questions

*asked by greg on April 20, 2008* -
## physics

Work Energy Lab a. What assumptions have been made in performing law of conversation of energy and analyzing the results? b. Which forces are directly responsible for generating ÄQ? c. How much work do these forces collectively (as opposed to

*asked by mas on October 4, 2010* -
## Physics

The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. (a) Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed of a person situated at

*asked by Ryan on September 30, 2016* -
## Planning

describe what you think will be your major challenges in getting and keeping part or full time employment in the next two years. Since I don't work right now, I am usually with my family, at home, not really that busy. So once I start working, I think my

*asked by Anonymous on April 21, 2011* -
## math/algebra

I have been asked to answer questions in parts in relation to a story problem, but I am having difficulty finding the right formulas. Did I do this right...If not, please help me and tell me where I went wrong. Part B The landscaper that maintains Mrs.

*asked by Anna please HELP, I need this by 7:00 on November 19, 2009* -
## Calculus - Math

Sorry in advance - it's a very wordy, multi part question. The parts with the ..........are the parts that require an answer. I have no idea where to begin or what to do to solve this. We will determine the volume obtained when revolving the solid bound by

*asked by Sarah on October 31, 2011* -
## geometry

BD is a perpendicular bisector of triangle ABC. XZ is a perpendicular bisector of triangle WXY. Triangle ABC is similar to triangle WXY with a scale factor of 1:2. Part I. Find BD, AB, WZ, XZ and WX. Part II. What is the scale factor of the perimeters of

*asked by Amira on April 29, 2010* -
## another geometry question

BD is a perpendicular bisector of triangle ABC. XZ is a perpendicular bisector of triangle WXY. Triangle ABC is similar to triangle WXY with a scale factor of 1:2. Part I. Find BD, AB, WZ, XZ and WX. Part II. What is the scale factor of the perimeters of

*asked by mike on May 7, 2007* -
## Chem

2. Suppose a chemistry student made 2000. mL of 6.00 M HCl. He accidently spilled half of this solution on the floor. What is the Molarity of HCL left in the beaker? Explain the answer... - for this problem, would I use the eq'N, M1V1=M2V2. 3. What is the

*asked by Lina on January 31, 2017* -
## chemistry

Would the following errors cause an increase or decrease in absorbance and % Transmittance? insoluble particles were accidentally pipetted into the cuvette with the solution the cuvette was wet and not prerinsed with the solution. fingerprints were not

*asked by jared on May 10, 2007* -
## Math

A solution of 10% sulfuric acid and one of 25% sulfuric acid are to be used to make 500 ml of 20% sulfuric acid. How many ml of each solution needs to be used in the mixture? (round answers to the nearest ml)

*asked by Kira on September 8, 2015* -
## probability

Two questions: 1. Assume a building has two independent security alarm systems. The first system works for 80% of the time and the second works 70% of the time. What percentage of time is the building protected by at least one security alarm system? Please

*asked by Karen on June 6, 2014* -
## physics hey bob

you help me solve this problem. but how am i suppose to if i don't know the mass of the car? on a level road the stopping distance for an automobile is 35.0m for an initail speed of 90 km/hr what is the stopping distance of the same automobile on a simalr

*asked by anthony on October 31, 2010* -
## Computer science

As a member of the Information Security team at a small college, you have been made the project manager to install an access control system (ACS) in a dormitory. The ACS will automatically unlock the dormitory doors via an electronic proximity reader and

*asked by Kelon on July 22, 2012* -
## Computer science

As a member of the Information Security team at a small college, you have been made the project manager to install an access control system (ACS) in a dormitory. The ACS will automatically unlock the dormitory doors via an electronic proximity reader and

*asked by Kelon on July 17, 2012* -
## Geometry

1. In the formula -2x-y=7, what is the slope? 2. An isoceles trapezoid has____pair(s) of parallel sides. 3. Is a triangle with sides of 6,8, and 10, a right triangle? yes or no. 4.Find the area of the rectangle(30cm, 40cm,40cm. 5. Use factoring to simplify

*asked by Patricia on April 15, 2010* -
## algebra

In this equation or question: translate the following text into an equation involving ratios and solve it. " Anne is paid $45 per hour, if she worked 55 hours in a particular week, how much will she be paid that week? 45/1 = x/55: cross multiply and solve

*asked by Johnny on June 22, 2014* -
## chemistry

An aqueous solution contains three solutes. One liter contains: 0.200 moles of calcium chloride, 0.150 moles of magnesium chloride, and 0.750 moles of sodium chloride. How many grams of Cl are there per liter of this solution? a. 39.0 g b. 51.4 g c. 78.0 g

*asked by Lisa on October 24, 2015* -
## chemistry

Calculate the volume of 1.00 M acetic acid solution and mass of sodium acetate needed to make 250 mL of a 0.450 M acetic acid/acetate buffer solution with a pH of 4.00. (The pKa is 4.74 for acetic acid).

*asked by eddie on November 3, 2014* -
## Math

How do you find the percentage of a number? I have no clue how you do that. An example I have is 850 students are attending a camp, 38% of them play musical instruments. What number of people play instruments? I don't get how to solve that and here's

*asked by Jessie on October 22, 2012* -
## Pre-Calculus

Use applications of exponential functions and logarithmic functions to solve. The half-life of plutonium 241 is 14.4 years.If 100 grams is present now, How much will it take to reach 2 grams of plutonium 241? y=a(1/2)^(t/14.4) How do I solve for t? I'm not

*asked by Suga on December 14, 2017* -
## math

1.What is the diameter of a sphere that has a volume of 3052.08 m^3? My answer is: 9m 2.What is the radius of a sphere that has a volume of 2304π m^3? My answer is:12m ~If i get it wrong please explain it to me how to get it, i know the formula and how to

*asked by Jakis on February 21, 2017* -
## Algebra-Please check

1. solve sqrt (11-x) = sqrt(x-7) choices are 6,7,8 or9 I think according to my calcs the answer is (9) The range of f(x) = sqrt(3x-6) - 2 answers would be y= (-2) y> (-2) y

*asked by Erica on January 8, 2011* -
## physics

A helicopter lifts a 70 kg astronaut 13 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/10. (a) How much work is done on the astronaut by the force from the helicopter? J (b) How much work is done on the astronaut by

*asked by Anonymous on October 1, 2009* -
## math

write all the steps to solve the following problem. explain your steps as you solve it. a certain computer can perform 10^5 calculations per second. how many calculations can it perform in 10 seconds?

*asked by math help asap on November 12, 2014* -
## Math

Solve for the missing variable: ALL FIGURES ARE SIMILAR. Figure 1: 8m-side 1 and 6m-side 2. Figure 2: 20m-side 1 and r meters-side 2. r=? Solve for r. Can you help me? Thank you.

*asked by Happyface on August 22, 2008* -
## Math

1) Solve for x and check Radical (x^2-10x)=3i 2) Simplify (5+ Radical 2)/(5-Radical 2) 3)describe the nature of the roots x^2-x-6=0 x^2+4x+29=0 4) Solve for x and check Radical (x^2 +4x +44) +3=2x I got 7 and -5/3 as answers, was not sure though

*asked by JP on December 11, 2008* -
## Career

1.)How people produce, distribute, and use goods and services? a.) Economy b.) Free enterprise system c.) Competition d.) Profit 2.)The amount of goods and services available for sale. a.) Producers b.) Consumers c.) Supply d.) Demand 3.)The amount of

*asked by Amanda on April 30, 2015* -
## environmental science

what causes salinization? Poor drainage, semi-arid or arid region of the world, water table 2-3 meters from the surface are some of the reasons. You can go to www.google.com and type in salinization. There are a number of articles there worth reading. need

*asked by Toni on September 15, 2006* -
## Simple interest!

Kenneth recentley started a new job. his starting gross monthly salary was 3200. Each year on the anniversary of his starting date, kenneth is promised a 7% raise. If keneth works for 5 years what was his gross annual income in his fifth year of work? my

*asked by brandy! on October 19, 2006* -
## Algebra

Natalie earns $2.50 for each CD she sells and $3.50 for each DVD she sells. Natalie sold 45 DVDs last year. She earned a total of $780 last year selling CDs and DVDs. Write an equation that can be used to determine the number of CDs (c) Natalie sold last

*asked by Amy on February 17, 2013* -
## Algebra

Natalie earns $2.50 for each CD she sells and $3.50 for each DVD she sells. Natalie sold 45 DVDs last year. She earned a total of $780 last year selling CDs and DVDs. Write an equation that can be used to determine the number of CDs (c) Natalie sold last

*asked by Sylvie on February 16, 2013* -
## calculus

A tank with a rectangular base and rectangular sides is to be open at the top. It is to be constructed so that its width is 4 meters and its volume is 36 cubic meters. Building the tank costs $10 per square meter for the base and $5 per square meter for

*asked by john on December 12, 2011* -
## Chemistry

I found this on the internet and I need an explanation. Q: You want to make sure a large weather balloon does not burst and wish to check the temperature at 3000 meters altitude. The balloon manufacture guarantees the balloon up to 60.0 Liters in size.

*asked by Jane on March 22, 2015* -
## Social Studies Pretest Lesson 1 Unit 7

1: Why is urbanization associated with the Industrial Revolution? A:The expansion of family farms refocused the nation on agriculture. B:The concentration of factories in cities brought job opportunities. C: Settlers expanded the frontier West of the

*asked by Reeces on December 7, 2016* -
## ALgebra

A theatre production company donated free tickets for their show to the local Boys & Girls club. They claimed that the ticket value was $306. A child's ticket cost $5.25 and an adult ticket cost $9.75. If there were three times as many children's tickets

*asked by Alison on June 12, 2014* -
## 6th Grade Math

Carmen received some money for her birthday on Friday. That night, she took her friend out to dinner. She spent half of her check for dinner. Then she tipped the waiter $6. The next evening she went to dinner alone, she spent half of the money she had

*asked by Brandi on March 30, 2009* -
## probability

a teacher on her way to work passes through 3 stoplights each morning. the distances between the stop lights are great and the lights operate independently of each other. if the probability of the red lights are .4,.8 and .6 for each light, what is the

*asked by Lindsey on February 25, 2014* -
## calculus

Eight and one-half foot-pounds of work is required to compress a spring 3 inches from its natural length. Find the work required to compress the spring an additional one-half inch. (Round your answer to two decimal places.)

*asked by fgm on January 25, 2012* -
## Physics

(a) Determine the amount of work (in joules) that must be done on a 95 kg payload to elevate it to a height of 1007 km above the Earth's surface. ANSWER in MJ (b) Determine the amount of additional work that is required to put the payload into circular

*asked by Steve on March 22, 2011* -
## Physics

A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.1 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. a. How

*asked by Anonymous on July 31, 2012* -
## Physics

A basketball player makes a jump shot. The 0.650-kg ball is released at a height of 1.80 m above the floor with a speed of 7.80 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.40 m/s. What is the work done on the ball by air

*asked by A on March 6, 2018* -
## Physics

A construction crew pulls up an 87.5-kg load using a rope thrown over a pulley and pulled by an electric motor. They lift the load 15.1 m and it arrives with a speed of 15.6 m/s having started from rest. Assume that acceleration was not constant. a. How

*asked by Anonymous on July 31, 2012* -
## physics

Calculate the work required to be done to stop a car of 250 kg moving at a speed of 18km/hr? answer is right or not please check Mass =250 kg Velocity = 18kg = 18 x 1000/60 x 60 = 5 m/s KE = ½ mv x v = ½ x 250 x 5 = 125 x 5 = 625 J Therefore the counter

*asked by Evangelin Lenin on December 31, 2015* -
## Grammar

1.Which of the following sentences have (unreduced) compound clauses? Briefly explain your answer. a.I like cities with parks and public sculptures. b.Everyday he either burns the toast or overcooks the eggs. c.Neither does he drink nor does he swear.

*asked by Nora on April 7, 2009* -
## Algebra

Use the five steps for problem solving. Enrollment at a particular online university is 11,600. There are seven times as many students who work full time as there are students who do not. How many students work full time and how many do not?

*asked by Poochie on July 10, 2011* -
## Algebra

Use the five steps for solving problems Enrollment at a particular online university is 11,600. There are seven times as many students who work full time as there are students who do not. How many students work full time and how many do not?

*asked by Poochie on July 10, 2011* -
## Engineering science

A water pump produces 9KL of water per hour at a height of 70 m above the pump.The pump is driven by a 3 KW electric motor.calculate. 1) The work done per hour 2) The work done per minute

*asked by Thulani on September 27, 2014* -
## physics

a 5.0 kg mass hangs at the end of a cord. Find the tension in the cord if the acceleration of the mass is 1.5 m/s squared up. I'm trying to find the formula (s) to plug in the numbers to work the problem. if you can help me with the formulas and plugging

*asked by courtland on February 5, 2010* -
## Finance

Sauerfood company has decided to buy a new computer system with an expected life of 3 yrs. the cost is 150,000.the comapny can borrow $150,000 for 3yrs at 10% annual interest or for one yr at 8% annual interest. How much wld sauer save in interest over the

*asked by Nancy on November 8, 2010* -
## about dentists

what clothes are dentists required to wear to work? who will pay for the clothes that they wear to work?

*asked by melissa on April 18, 2009* -
## math

Number of days taken by 1 man to complete the same work is less than by number of days taken by 1 women to do this work?

*asked by renjith on May 17, 2017* -
## physics

How much power is required to do 110 J of work on an object in a time of 0.4 s? W How much power is required if the same work is done in 5 s? W

*asked by james on January 23, 2012* -
## Math

3. A can do a piece of work in 6 days. B is 50% more efficient. The number of days it take B to do work is A. 9 B. 3 C. 2 D. 4 Is the answer 4? If so, how did you get your answer?

*asked by 7th grade Math on August 13, 2015* -
## maths ( mental ability)

P can do a piece of work in 9 days. Q is 50% more efficient than P. The number of days it takes Q to do the same piece of work is?

*asked by rupesh on November 2, 2009* -
## math

10 men can do a piece of work in 10 days.how many days can 100 men take to do the same amount of work?

*asked by mary on July 24, 2009* -
## Statistics

cant tell if i am on right track for this prababilitly hw assigment help would good! I was recently given a hw assigment dealing with the price is right's "money game". The contestant is shown nine cards on a board. Each card has one pair of numbers. One

*asked by Mike jenkins on July 18, 2012* -
## psy

Please help, very lost Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula

*asked by mary on February 1, 2010* -
## psycholgy

Please help, very lost Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula

*asked by mary on February 1, 2010* -
## algebra

Okay, how do you factor a polynomial when there is a number in front of the highest x term. For example: how would you factor 2x^2-11x+15 i know the answer is (2x-5)(x-3), right? So you put the 2x on one side and then you put an x on the other. And then

*asked by Fidelia on May 15, 2007* -
## English Improving writing

Ok this what I have now Thanks to all of you for your help Brain storming revised The problem is Jack and Rachel often has nothing to do Bonnie and Molly is working extra and have to work over time Melanie and Jessica share an administrative assistant

*asked by Kaleigh-Anne on June 9, 2008* -
## algebra 2

Would some one look at these problems and see if I got them right Thanks Just let me if they are wrong so I can go back over them 1.Write in simplest form 48/56 A. 6/7 2.Multiply 8x^3/5 *10/x^3 A. 16/x^4 3.Divide 4/x^7 / 12/x^3 A. 1/3x^2 4. divide

*asked by CINDY on June 1, 2007* -
## Math

You are given two equations which are both true, and you are asked to solve for both x and y. You plan to solve this set of equations by substituting part of one equation into the other so you end up with an equation that contains only x's or only y's. The

*asked by Jen on October 7, 2008* -
## Math 102

if you have a pizza with a diameter of 20 that is cut equally into 4 pieces, one way horizontal and one way vertical. how do i figure out where to place 2 non-center vertical cuts so that the pizza has 8 equal parts? i found the area for the circle to be

*asked by Nick on April 27, 2010* -
## physics

A typical problem in physics is that physical quantities can be calculated for a series of ﬁnite systems, but ultimately, we would like to know the results for the inﬁnite system. Hulthen (1938) studied the one-dimensional Spin Heisenberg model with

*asked by Kedir on November 2, 2018* -
## Chemistry

When 0.100 L of 0.200 M K2C2O4 react with 0.150 L of 0.250 M BaBr2, BaC2O4 forms an insoluble precipitate. Calculate the final concentrations of the ions that remain in solution after the reaction. I know how to get the net ionic equation (Ba2+ + C2O4- ->

*asked by Anonymoose on October 1, 2018* -
## Chemistry

A solution of sodium hydroxide is standard- ized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.654 g; buret reading before titration 0.23 mL;

*asked by Broy on October 4, 2011* -
## Chemistry

Lead(II) nitrate solution reacts with potassium iodide solution to produce lead(II) iodide and potassium nitrate. The answer in the book is: Pb(NO3)2(aq) + 2 KI(aq) ---> 2KNO3(aq) + PbI2(s) I understand how to write and balance the equation. However, I am

*asked by Jeff on January 28, 2011* -
## Science

this my science homework about milo so yeah if you can answer these would be great. What is the solute? What is the solvent? Was the mixture a solution or a suspension explains why? Which part of the mixture is the sediment? Explain why the particles

*asked by Jeremy Yea on May 30, 2010* -
## science

an unknown molarity of HCl acts as an analyte.50mL of it is placed into a conical flask ans a 0.1M of solution of NaOH was used as a reagent. The endpoint is pH=7, with a pKa of 6.5 chosen.The colour of the solution changed when 10mL of 0.1012M NaOH WAS

*asked by constance modongo on October 16, 2018* -
## AP chemistry

A solution of sodium hydroxide is standard- ized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.894 g; buret reading before titration 0.13 mL;

*asked by Anonymous on October 24, 2010* -
## chemistry

A solution of sodium hydroxide is standard- ized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). From the following data, calculate the molarity of the NaOH solution: mass of KHP 1.744 g; buret reading before titration 0.13 mL;

*asked by cheri on September 19, 2012* -
## Math

Hi! Okay so I started to attempt this math problem; 3cot^2x-1=0. However, I'm a little stuck. My teacher wants me to find the Location on The Unit Circle, Period, and General Solution. Can someone check what I have and help me with the rest? 3cot^2x-1=0

*asked by Oscar on January 26, 2015* -
## Hayden

Chloroacetic acid has a relatively large equilibrium constant, so at low acid concentrations it is necessary to use the quadratic equation in order to calculate the concentrations of the aqueous species. Ka for ClCH2COOH is 1.4 ´ 10-3. For the problems

*asked by leona on June 19, 2010*

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