1. Algebra 1

    Solve the system of equation by graphing. Then classify the system. 4x-y=11 4x+5y=-31. Thank you.

    asked by Esther on February 3, 2011
  2. College Algebra

    A pharmacist wants to mix two solutions to obtain 100 cc of a solution that has an 8% concentration of a certain medicine. If one solution has a 10% concentration of the medicine and the second has a 5% concentration, how much od each of these solutions

    asked by Math H of the medcater on January 7, 2015
  3. physics

    a 50kg box on a ramp needs to be lifted 3m using a force of 100N. What tpe of pulley system could do the work? What type of lever system?

    asked by A on November 17, 2015
  4. Math

    Can somebody please explain to me how to factor trinomials that contain two unknown variables and are complex sum & product?? Examples: 2x^2 + 13xy + 15y^2 11x^2 + 14xy + 3y^2 I understand how to factor trinomials that only have x as the variable, but

    asked by Danielle on April 4, 2007
  5. Numerical method - numerical integration

    Evaluate the following integration: I(f) = integral sign from 0 to 20 of e^(-x) dx 1. Analytically 2. Rectangle method with h= 10,5,4,2,1. 3. Mid-point method with h= 10,5,4,2,1. 4. Trapezoidal method with h= 10,5,4,2,1. 5. Simpson's method with h=

    asked by Anonymous on November 1, 2010
  6. Numerical method - numerical integration

    Evaluate the following integration: I(f) = integral sign from 0 to 20 of e^(-x) dx 1. Analytically 2. Rectangle method with h= 10,5,4,2,1. 3. Mid-point method with h= 10,5,4,2,1. 4. Trapezoidal method with h= 10,5,4,2,1. 5. Simpson's method with h=

    asked by Anonymous on October 31, 2010
  7. chemistry

    How many grams of magnesium metal will react completely with 5.2 liters of 4.0 M HCl? Show all of the work needed to solve this problem. Mg (s) + 2 HCl (aq) yields MgCl2 (aq) + H2 (g)

    asked by Tessa on May 21, 2014
  8. Mathematics

    9A. Solve the inequality.Show all steps.15 > 7 - t/3 9B. Check your work. Hi. I'm not trying to cheat. I don't understand the equation. If you see another question by me with the same question, I'm sorry. I had hit submit and it wasn't there. Sorry.

    asked by Invisible on November 4, 2016
  9. chem

    If 34.2 grams of lithium react with excess water, how many liters of hydrogen gas can be produced at 299 Kelvin and 1.21 atmospheres? Show all of the work used to solve this problem. 2 Li (s) + 2 H2O (l) yields 2 LiOH (aq) + H2 (g)

    asked by rae on February 19, 2014
  10. 7th Grade Math 123

    Write one or two equations to represent the situation below. Solve the equation(s). Show all your work. A collection of dimes and quarters totals 72 coins. Together the dimes and quarters are equal to $11.70. How many of each coin are in the collection? 2

    asked by Danny on November 7, 2006
  11. Physics

    Let mass be: m1=0.100 kg m2=0.300 kg m3=0.500 kg (a.)Compute for the acceleration of the system if the table is frictionless. (b.)Compute the acceleration of the system if the coefficient of the friction between the m2 and the table is 0.400. You can't

    asked by frosty on September 10, 2006
  12. Math

    Using the intersection method, I need to solve the following equation: 5x-3.3=x-2.1 Can you point me on the right path? you have to get x's on one side, and the numbers on the other. then solve for x. Kira, Thank so much for your help, but how do you graph

    asked by Olivia on December 20, 2006
  13. Algebra

    Solve the inequality and graph the solution. 9(x+2)>9(x-3) my work: 9x+18>9x-27 +27 +27 ____________ 9x+45>9x -9x -9x ____________ 45>0 I found it to come out to 45>0.. but that can't be right. What am I doing wrong?

    asked by Anonymous on September 10, 2009
  14. Algebra

    I keep confusing myself when I look at this word problem. I am not sure if I am setting it up correctly. Any advice would be appreciated. It has several parts to it. 1. Suppose you are in the market for a new home and are interested in a new housing

    asked by It's me :) on February 2, 2009
  15. psychology

    •Write at least 300 words describing a time when you had to test a theory. This theory may be something you have tested at work, school, or even at home. ◦What type of informal research method did you use? ◦How was your research method similar to

    asked by charles miller on May 16, 2011
  16. Financial Management

    The finance department of a large corporation has evaluated a possible capital project using the NPV method, the Payback Method, and the IRR method. The analysts are puzzled, since the NPV indicated rejection, but the IRR and Payback methods both indicated

    asked by Anonymous on November 12, 2012
  17. math

    Joe owns a sandwich shop. He charges $10.00 for two sandwiches and one drink and $6.50 for one sandwich and one drink. How much does Joe charge per sandwich? How much per drink? What is the solution of the system? Use elimination. 3 − 2 = 5 −2 + = −3

    asked by Help i need somebody not just anybody on January 22, 2019
  18. math , help

    can someone show me how to solve this: directions: pivot once as indicated in each simplex tableau. Read the solution from the result. the number that is highlighted is row 2 column 3 which is the 5 the matrix is a 4 X 8 under column one it reads as:

    asked by jas on June 13, 2007
  19. Chemistry

    Consider these changes. (a) Hg(l)->Hg(g) (b) 3O2(g)->2O3(g) (c) CuSo4*5H2O(s)->CuSO4(s)+5H2O(g) (d) H2(g)+F2(g)->2HF(g) At constant pressure, in which of the reactions is work done by the system on the surroundings? By the surroundings on the system? In

    asked by Anonymous on November 9, 2011
  20. MATH

    A pharmacist mixed some 10%-saline solution with some 15%-saline solution to obtain 100 mL of a 12%-saline solution. How much of the 10%-saline solution did the pharmacist use in the mixture? A 60 mL B 45 mL C 40 mL D 25 mL CAN SOME GIVE AN EQUATION TO

    asked by Anonymous on May 7, 2010
  21. Pre-calculus-check answers

    Write the slope-intercept form of the equation of the line that passes through the point (-5,4)and has a slope of -1. Answer: y=-x-1 2)Solve the system of equations algebraically: 1/3x+1/3y=1 and 2x+2y=9 Answer: no solution

    asked by Lucy on August 23, 2008
  22. Accounting

    In its first month of operations, Giffin Company made three purchases of merchandise in the following sequence: (1) 260 units at $5, (2) 360 units at $7, and (3) 460 units at $8. Assuming there are 160 units on hand at the end of the period, compute the

    asked by Allie on October 12, 2015
  23. health and physical

    your digestive system has three main functions:digestion, absorption and elimination. in which organ dose absorption begin? a. mouth*** b.stomach c.small intestine d.gallbladder i think a.mouth

    asked by larry :can you please check my answers on May 2, 2016
  24. help!!!!!

    1. A sample of air was found to contain 21% oxygen by volume. how many ml of oxygen are present in 2.0 L of air? 2. A 25.0g solution containing salt and water is 2.2% salt by mass. what is the mass (in g) of salt in the solution? please show me how to

    asked by Anonymous on September 13, 2011
  25. chemistry

    Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: balance steel can tin electrode power source wire lead (x2) tin (II) chloride solution (3.25 M) timer large beaker Procedure: Take

    asked by Jennifer on April 17, 2008
  26. Algebra I

    How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation. What steps will be taken to solve the system that you provided?

    asked by Austin on August 28, 2012
  27. AP Physics

    When traveling a highway in the mountains, you may see elevation signs that read "914 m (3000 ft)". Critics of the metric system claimt hat such numbers show the metric system is more complicated. How would you alter such signs to be more consistent with a

    asked by AP Physics on June 10, 2009
  28. math

    I am not sure how to do these. 1. Simplify 4√6/√30 by rationalizing the denominator. Show your work. 2. Simplify (2√5 + 3√7)^2 Show your work. Justify each step.

    asked by edison1969 on July 30, 2014
  29. numerical methods

    Consider a spherical storage tank containing oil. The tank has a diameter of 8 ft. You are asked to calculate the height h to which a dipstick 10 ft long would be wet with oil when immersed in the tank when it contains 6 3 ft of oil. The equation that

    asked by aira on April 23, 2015
  30. statistics

    2. A researcher measures the heart rate in a population of runners and finds they have an average heart rate of µ = 50, σ = 5. You do not need to show a graph, only computation work. 2A. Based on the average heart rate cited above, what proportion would

    asked by chris on June 27, 2014
  31. Algebra Problem

    I've gotten confunsed. Please help. Solve: 2y-a = a + 3b ____ ______, for y 3 4 Please show how to solve this. If you mean (2y -a)/3 = (a + 3b)/4 then 2y - a = (3/4) (a + 3 b) 2y = (7/4) a + (9/4) b y = (7/8) a + (9/8) b f(x)=x(squared)-4x+9 solve for x

    asked by amy on August 30, 2005
  32. math

    3/4x-2/5y=2 1/2x-3/5y=-2 im having trouble re aranging the y and the x values and im saposed to be sovling it with either substition or elimination Try this: Double the last equation to get x = -4 + (6/5) y Then substitute that x into the first equation

    asked by robynn on March 27, 2007
  33. Math help

    How would you solve these systems by elimination? I'm in desperate need of help! 1. -35x-15y=0 -56x+24y=0 2. -56x+72y=-16 -49x+63y=-14

    asked by Anonymous on January 25, 2014
  34. math

    What is the solution to x+5+x+1+x=3(x+2)+1 1)x=0 2)x=3 3)no solution 4) infinite I got #3 no solution x+5+x+1+x=3(x+2)+1 x+5+x+1+x=3x+6+1 3x+6=3x+7 -3x -3x 6=7 so no solution Is this correct? Thanks for checking over my work.

    asked by B8 on January 11, 2014
  35. Physics

    A system performs 349 J of work on its surroundings while losing 133 J of internal energy. Determine the heat transferred to the system during this process.

    asked by Kaley on June 21, 2012
  36. Thermodynamics

    in a certain process, 500 cal of heat are supplied to a system, and at the same time 100 joules of work are done. what is the increase in the internal energy of the system

    asked by Kingchaww on October 16, 2017
  37. math

    Dave & Jim separated the peanuts they had collected into two piles. One pile was for doubles (2 peanuts inside) and the other for triples (3 peanuts inside). When they finished shelling peanuts, Dave & Jim had 35 shells and 78 peanuts. How many shells were

    asked by jenny on August 29, 2006
  38. chem

    no idea how to do this! Please help! Determine the freezing point of a water solution of fructose( C6H12O6) made by dissolving 59.0 g of fructose in 485g of water. Answer in celcius. Same method outlined for your other post. Post any work if you get stuck.

    asked by Anonymous on May 29, 2007
  39. algebra

    System of equations, the addition method 3x-3y=6 3x+3y=0 Whats the answer?

    asked by noelle on May 21, 2008
  40. Math

    what are the pros and cons of the substitution method in a system of equations?

    asked by Sally123 on September 18, 2018
  41. govenment

    1)In what ways does the existence of minor parties also work to strengthen the United States' two-party system? 2)What does the fact that aliens generally are not allowed to vote show about American beliefs? It shows that Americans believe that no one

    asked by Debra on March 27, 2007
  42. math

    Create a linear system to model this situation. Then use substitution to solve the linear system to solve the problem. - Bobbie has been saving dimes & quarters to buy a new toy. She has a total of 28 dimes and quarters, with a value of $4.30. How many of

    asked by trixie on June 11, 2013
  43. chemistry

    calculate the molarity of an acetic acid solution if 83.71 mL of the solutions needed to neutralize103 mL of 1.08 M sodium hydroxide. the equation for the reaction is. HC2H3O2(aq) + NaOH(aq) >Na+(aq) + C2H3)2(aq) +H2O(aq) Please show your work i really

    asked by Randy on April 30, 2012
  44. MATH

    Carolyn and Kim are selling lemonade this summer.  It costs $0.10 to make each cup of lemonade.  They are going to sell each cup of lemonade for $0.25. a. What is the total cost to make 55 cups of lemonade? Show or explain your work.$5.50 b. If they

    asked by NINA on February 20, 2012
  45. Geometry

    Complete Problem 34 in Section 5.2 Exercises (Ch. 5) of Essentials of Geometry for College Students. Use the table below to show your work and solve the problem. You may add or delete rows as necessary.

    asked by Ice on July 6, 2015
  46. prealgerbra

    how do you solve 45 min/2 mi=?h/1 mi pre algerbra - drwls, Friday, January 6, 2012 at 11:44pm If you go 2 miles in 3/4 hour, you go 1 mile in 3/8 hour (or 22.5 minutes). how do we show are work then

    asked by steph on January 7, 2012
  47. math 210 fundamentals of geometry

    Complete Problem 31 in Section 5.2 Exercises (Ch. 5) of Essentials of Geometry for College Students. Use the table below to show your work and solve the problem. You may add or delete rows as necessary.

    asked by barbara on December 4, 2015
  48. chemistry

    a sample of sodium-24 with an activity of 12 mCi is used to study the rate of blood flow in the circulatory system. If sodium-24 has a half-life of 15 h, what is the activity of the sodium after 2.5 days. please show work.

    asked by rachel on October 4, 2012
  49. Algebra

    Solve -3/8h=9. Show work. A. -24 B. -3.375 C. 9.375 D. 72

    asked by Deja on July 19, 2011
  50. Math - system of equations

    write two other equations that have the same solution as this system od equations. 3x-4y=-14 -x+3y=18 I found the solution to the system it is (6,8) there after how do i go about it?

    asked by Shaila on September 7, 2010
  51. Math

    1. Should the census figures be adjusted for the undercount? If so, how? If this solution introduces errors of its own, estimate how large they are, compared to the undercounts. 2. What method should Congress select for apportioning the House of

    asked by David Earnest on March 6, 2010
  52. Algebra

    1. A printer can print 40 pages in 1.6 minutes. a. Write and solve a proportion to find the number of pages that the printer can print in 5 minutes. Show your work. b. Lana wants to use the printer to print 150 pages. Find the time, in minutes, it will

    asked by Anonymous on June 13, 2014
  53. chemistry

    I have many questions. I have a test tuesday and need to get these problems done and understand them today because i am currently studying. I am in college and my professor has not emailed me back regarding solutions for the review problems she posted. Is

    asked by Sarah (C) on April 23, 2011
  54. Algebra I

    to determine whether a given number is a solution of an equation. Problem: Is 5 a solution of 10x-xto the 2nd power = 3x-10? my work: 10(5)-25=25 and 50-25=25 so x is not a solution. right or wrong? Im new at this

    asked by Nancy on September 9, 2014
  55. calculas

    Consider a cooling cup of coffee whose initial temperature is 205°. The room temperature is held at 70°. Suppose k = 1/16. Let y be the temperature, and y' its time derivative. ----------------------------------- I have the differential equation: y' =

    asked by pasta! on March 12, 2012
  56. chemistry

    pleast help me work this prob lead is a toxic meatal that affects the central nervous system. a Pb-contaminated water sample contains 0.0011% Pb by mass. What vilume of the water in milliliters contains 115g of Pb? (assume that the density of the solution

    asked by swtnblk on November 5, 2011
  57. chemistry

    pleast help me work this prob lead is a toxic meatal that affects the central nervous system. a Pb-contaminated water sample contains 0.0011% Pb by mass. What vilume of the water in milliliters contains 115g of Pb? (assume that the density of the solution

    asked by swtnblk on November 6, 2011
  58. Algebra II

    1) There is a solution to x = -(y-5)^2 and x = (y -5 )^2 + 7 a) true b) false 2) There is no real solution to y = -1 and y = x^2 + 9 a) true b) false 3) the vertex of the graph of y = 3(x+ 9)^2 + 5 is a minimum value ? a) true b) false 4)find the center

    asked by anonymous on April 17, 2011
  59. Math

    7k divided by 3=21 Can you please show me the work? I know that k=9 but I don't know how to show the work.

    asked by Zero on March 9, 2015
  60. math

    how do i show my work for, 5+10/(1*(8+6)-4=6 ya i know the answer but i wanna know how to show my work.

    asked by karla on January 9, 2012
  61. statistics

    If the probability of running out of gas is .03 and the probability the electronic starting system will not work is .01 a.) what is the probability there will be enough gas and that the starting system will work? assume the two events are independent b.)

    asked by kkg on September 2, 2011
  62. Algebra help

    I need to solve the system by triangularizing the augmented matrix and using back substitution. If the system is linearly dependent, give the soloution in terms of a parameter. -3x+y-z=-4 6x-2y+2z=8 -12x+4y-4z=-16

    asked by Kristen on March 27, 2013
  63. Halfway solved-calc

    So I'm trying to solve this problem but one thing I don't get is, how do I know which method to use just by looking at the graph (disk, washer, or shell)? Find the volume of the solid generated by revolving the region bounded by the graphs y=x^2- 4x+ 5 and

    asked by Hannah on May 22, 2013
  64. Chemisry

    What is the % M/M concentration of 5.00 mL of methanol in 25 g solution of methanol in water? The density of methanol is 0.791 g/mL. The density of water is 1.000 g/mL. The density of the solution is 0.995 g/mL. Please show work, thank you!

    asked by Rena on February 23, 2013
  65. math

    Tickets to a museum cost $3 and $8 for adults. a group of four visitors to the museum spent a total of $22 on tickets. Write and solve a system of equations to represent this situation. Interpret the solution

    asked by max on March 16, 2017
  66. math

    I'm having trouble trying to identify which method is best to use for graphing when faced with an equation. Are there certain things that I need to look out for that would indicate if it were best to use the table of values, slope-intercept method, or the

    asked by sarah on September 17, 2008
  67. Math

    Can someone please work out the steps in solving this elimination problem. Thank you. The problem is x + 2y = -7 x - 5y = 7

    asked by Tyler on April 17, 2014
  68. Chemistry

    Confused on these, please explain or show work for the answer if you can. :) 1. What is the morality of a water solution that freezes at -0.633°C? 2. What is the freezing point of a solution that contains 1.99 g of a molecular solute of molar mass 58.5

    asked by Lauren on December 6, 2017
  69. Art Help Please!!!!!

    To create a portfolio of work, thsi artist would do all of the following except. The picture is of a robot in black and white. A. include more drawings of characters the artist has created to show creativity. B. include a variety of color schemes and

    asked by Callie on November 25, 2014
  70. math

    (1)Is the Equation true, false, or open? 4y + 8 = 6y + 3 A. True; the expressionas are the same for all values of variables B. False; the expressions are never the same ****** C. Open; there is a varible (12)Which equation is an Identity A. 7 - (9x + 3) =

    asked by kelseypooh on October 9, 2018
  71. geometry

    The origin O and the points P(4,1) , Q(5,5) and R(1,4) form a quadrilateral. a) show that OR is parallel to PQ. b) show that OP is parallel to RQ. c) show that OP = OR. I found the answers to a & b through the use of gradients. However i do not know what

    asked by Emily on June 11, 2019
  72. Bio

    Which 2 body systems interact to make your body move? Circulatory System Skeletal System Muscular System

    asked by Please Help Meh!!! on May 1, 2019
  73. Algebra

    please help me with this question and check my answers. Solve the problem. A rectangle with width 2x + 5 inches has an area of 2x4 + 9x3 - 12x2 - 79x - 60 square inches. Write a polynomial that represents its length. ( I don't know how to solve this

    asked by Maddy on October 15, 2007
  74. GENERAL CHEMISTRY

    CALCULATE THE pH AND HYDROLYSIS IN 0.10 M AlCl3 SOLUTION.Ka = 1.2 X 10-5 FOR [Al(OH2)6]+3,OFTEN ABBREVIATED Al+3.TELL WHETHER pH IS ACID OR BASE.GIVE IONIC EQUATION. Help us a little by telling us how much you know to do and exactly what you don't

    asked by SHAWN on July 29, 2007
  75. Math

    a customer went to a garden shop and bought some potting soil for $12.50 and 6 shrubs if the total bill was $71 how much did each grub cost if they all cost the same write and solve an equation to show your work

    asked by Xxxtentacion on November 22, 2018
  76. math

    a customer went to a garden shop and bought some potting soil for 17.50 and shrubs. if the total bill was $71.00, how much did each shurb cost if they all cost the same? write and solve an equation. show your work

    asked by jessica on November 23, 2015
  77. Mathematics

    A high-jumper's path on a jump can be represented by the equation h=-16t^2+80t. At what time(s) does the jumper reach 84 ft? Show or explain your work. Ok, so i have no idea how to do this, does anyone know how to solve this question?

    asked by Ashley on June 1, 2019
  78. Math

    A customer went to the garden shop and bought some potting soil for $12.50 and 6 shrubs. If the total bill was $71.00, how much did each shrub cost if they all cost the same? Write and solve an equation. Show your work. $71.00-$12.50=$58.50 58.50/6=$9.75

    asked by lilyanna on November 20, 2018
  79. Chemistry

    12 mL of 0.0100 M HCl are added to 25.0 mL of a buffer solution that is 0.010 M HC2H3O2 and 0.11 M C2H3O2-. What is the pH of the resulting solution? I understand to use the ice method, however, i do understand what to plug into the hh equation.

    asked by Lil on March 6, 2016
  80. algebra 1

    what steps someone would take to use your method (substitution) and a clear argument stating the reason why your method is better than the other ones. (in other words, come up with a few good sentences that explain why you choose your method and why others

    asked by da on January 21, 2013
  81. algebra 1

    what steps someone would take to use your method (substitution) and a clear argument stating the reason why your method is better than the other ones. (in other words, come up with a few good sentences that explain why you choose your method and why others

    asked by da on January 21, 2013
  82. Numerical Analysis

    Using the bisection method, Newton’s method, and the secant method, find the largest positive root correct to three decimal places of x3 − 5x + 3 = 0. (All roots are in [−3,+3].)

    asked by Roy on February 21, 2011
  83. algebra 1

    what steps someone would take to use your method (substitution) and a clear argument stating the reason why your method is better than the other ones. (in other words, come up with a few good sentences that explain why you choose your method and why others

    asked by da on January 20, 2013
  84. algebra

    Find values for m and b in the following system so that the solution to the system is (-3,4). 5x+7y=b mx+y=22

    asked by Becky on December 26, 2007
  85. Algebra

    I have a few questions that I need help with. Solve the radical equation, and check all proposed solutions. 5. x- square root 3x-2=4 I don't understand this problem. Solve and check the equation. 10. (x^2+14x+49)^3/4-20=7 would I have to multiply each

    asked by Brit on August 18, 2007
  86. college

    • Write at least 300 words describing a time when you had to test a theory. This theory may be something you have tested at work, school, or even at home. • Answer the following questions in your summary: o What type of informal research method did you

    asked by Anonymous on December 17, 2010
  87. Algebra

    Classify each system. Give the number of solutions. y=3(x-1) -y+3x=3 My answer : 0=0 Infinitely many(consistent and dependent system) y-2x=5 X=y-3 My answer: 0=2 No solution(inconsistent system) Please My answers are true or false, if my answers are false

    asked by Han on September 24, 2018
  88. math -check

    given the equation -3x +2y =4, Write another equation that will form a linear system with: one solution, no solution and infinite solution. Graph the linear using graphing calculator and write your window setting in the format x: Xmin, xmax, Xscl. Y: Ymin,

    asked by Jay on April 15, 2015
  89. math

    Solve x^2+2x-4=0 When i try to factor this problem out I cant get it to work. Is this a no solution problem

    asked by jen on April 11, 2010
  90. math

    Hello, can someone please enlighten me? MSI means 1000 sq inches, right? I would like to convert this to feet, but I have no idea where to begin. Can you please show me the steps needed or even just show me an example? I was told by someone that 1MSI is

    asked by mary on August 15, 2011
  91. IMPORTANT MATH NEED HELP NOW!!!

    . Evaluate the expression. 2(y + 2) for y = 3 (1 point) –4 8 10 2 2. The cost in dollars of a field trip is 64 + 14n, where n is the number of people attending. What is the cost for 48 people? (1 point) $736 $126 $896 $910 3. Write a word phrase for p

    asked by Eevee on November 17, 2015
  92. Math

    Solve the logarithmic equation. Express your solutions in exact form only. Please show all of your work. log3(x+2) + log3(x+8) – 2 = log3(x+3)

    asked by Allison - Carson on June 9, 2011
  93. algebra 2

    can somebody tell me how I am to solve this problem? x+8)(x-19)(x+3)>0 A. The solution set is {x|___} B. The solution is all real numbers. C. There is no solution.

    asked by Nick on June 18, 2010
  94. Biology

    Match the terms with the correct description: a. regulates supply of gases from ATP production b. provides negative feedback signals c. protects body against foreign dangers d. "rapid transit" for liquids and gases e. primary "regulator" of sensory

    asked by mysterychicken on March 21, 2010
  95. Biology

    Match the terms with the correct description: a. regulates supply of gases from ATP production b. provides negative feedback signals c. protects body against foreign dangers d. "rapid transit" for liquids and gases e. primary "regulator" of sensory

    asked by mysterychicken on March 20, 2010
  96. Chemistry

    I am thrown off by this question because they don't give a molecule to work with. Also i don't know how i would work the acid... help! A 195 mL solution of a dilute acid is added to 102 mL of a base solution in a coffee-cup calorimeter. The temperature of

    asked by Ali on March 29, 2014
  97. algebra

    Solve the equation and write down the property you use at each step to simplify the equation. Consider the equation: 4x + 11 = (5x + 34)/2. Be sure to show your work.. Thank You Jiskha..!! :)

    asked by Twanisha on February 16, 2012
  98. Calculus

    Solve: dy = [2+(y-2x+3)^0.5]dx The answer in the book is 4(y - 2x + 3) = x^2 + C, but I don't know how to solve. I've tried solving, but this ODE is not exact, nor homogeneous and I don't think the method of integrating factors apply either. Please help.

    asked by Eren on October 11, 2013
  99. Trig

    I was doing this problem sin^-1 (4/5) if I'm not mistaking most teachers would say that .927295218 radians is wrong is just an estimation and therefore is wrong so I'm justified in putting this on my paper instead right ( ln( (4i +3)/5)/i ) right? She

    asked by Kate on July 23, 2010
  100. chemistry

    sorry i didn't post before.. Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: Balance Steel can Tin electrode Power Source Wire lead (x2) tin(II) chloride solution (3.25 M) Timer

    asked by samantha on April 18, 2008

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