# why does the equation x^2=-9 has no real solution why does the equation x^2 = 9 has two solutions

56,329 questions, page 92
1. ## 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
2. ## math

Lucas is designing a flower garden in the shape of an isosceles right triangle. He has created a scale diagram. The lengths of the perpendicular sides in the scale diagram are 7 cm, and the hypotenuse of the real garden will be 3 m long. What is the area

asked by shade on June 20, 2016
3. ## Chemistry

The quantity of antimony in a sample can be determined by an oxidation-reduction titration with an oxidizing agent. A 7.79-g sample of stibnite, an ore of antimony, is dissolved in hot, concentrated HCl(aq) and passed over a reducing agent so that all the

asked by Jackie on April 23, 2017
4. ## Question (answer quick)

I have a question it the reflection rules for literture they said for presentation i have to have 1 orgainal and 2 copies are to be submitted. Does that means a) I have to print out my real essay and make 2 more copies b) print out my real copy and make 2

asked by Laruen on November 13, 2011
5. ## College Algebra

This is what I have came up with so far, but it says to plug in another value for x in number 2, what does this mean? So the equation to convert Fahrenheit to Celsius is simply to take the temp in F, subtract it by 32 and then divide that value by 1.8. So

asked by Alicia on November 17, 2007
6. ## College Algebra

This is what I have came up with so far, but it says to plug in another value for x in number 2, what does this mean? 1. So the equation to convert Fahrenheit to Celsius is simply to take the temp in F, subtract it by 32 and then divide that value by 1.8.

asked by Alicia on November 17, 2007
7. ## "le Chat. Principle" #2

Hi, there are 5 questions and I was wondering if you could check them for me. Thanks! 3. The hypothetical equilibrium reaction represented by the equation that follows. QA(s) + 2 X(g)>>>Q(l) + X2A(g) + energy This reaction can be shifted to increase the

asked by Dave on July 19, 2006
8. ## Chemistry

What is the molar heat of reaction? When 0.732 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 119C 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.

asked by Chris on February 17, 2010
9. ## Math Algebra 1111

If the domain of a function F is the set of all real numbers and the domain of a function G is the set of all real numbers, under what circumstances do (F+G)(x) and (F/G)(x) have different domains? Whenever G(x) = 0 then the domains would differ. For

asked by GNTC on June 1, 2015
10. ## Chemistry

As a technician in a large pharmaceutical research firm, you need to produce 400. mL of 1.00 M potassium phosphate solution of pH = 7.18. The pKa of H2PO4- is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as

asked by Anonymous on February 28, 2011
11. ## chemistry

As a technician in a large pharmaceutical research firm, you need to produce 200 mL of 1.00 M a phosphate buffer solution of pH = 7.06. The pKa of H_2PO_4}^- is 7.21. You have 2.00 L of 1.00 M KH_2PO_4 solution and 1.50 L of 1.00 M K_2HPO_4 solution, as

asked by teja on May 11, 2012
12. ## Chemistry

As a technician in a large pharmaceutical research firm, you need to produce 100.mL of 1.00 M a phosphate buffer solution of pH = 7.45. The pKa of H2PO4− is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as

asked by Billy Bob Reynolds on March 31, 2014
13. ## chemistry

As a technician in a large pharmaceutical research firm, you need to produce 200.mL of 1.00 M a phosphate buffer solution of pH = 7.19. The pKa of H2PO4− is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as

asked by moses on September 14, 2013
14. ## CHEMISTRY

As a technician in a large pharmaceutical research firm, you need to produce 450. mL of 1.00 M a phosphate buffer solution of pH = 7.20. The pKa of H2PO4− is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as

asked by jess on September 18, 2016
15. ## CHEMISTRY

A buffer was prepared by dissolving 0.40 mol of benzoic acid (Ka=6.3*10^-5) and 0.50 mol of sodium benzoate in sufficient pure water to form a 1.00 L solution. To this solution was added 30.00 mL of 2.00 M HCl solution. What was the pH of the new solution?

asked by Sally on April 3, 2018
16. ## physics

The first graph you plotted is called a speed-time graph. However, information other than speed or time can be obtained from such graphs. (a) What does the area under the line of the graph represent? the distance traveled? (b) Write an equation to

asked by Anonymous on October 21, 2007
17. ## chemistry

How many milliliters of a 4.5 M HCl solution would be needed to react completely with 5.8 g of aluminum? I know the answer is somewhere around 143 mL HCl, but I CANNOT figure out how to find that answer. I have done a conversion from g of Al to mL of HCl

asked by Reeseamelia on May 5, 2015
18. ## Calculus

Demand Equation. The price(in dollars),and the quantity x sold of a certain product, obey the demand equation. I can't figure out what price the company should charge to maximize revenue p=-1/10x+150 R=p*x R=((-1/10)*x+150)*x R=(-1/10)*x^2+150x

asked by Anonymous-1 on June 22, 2015
19. ## Math

In 1990, the population of Cheyenne, Wyoming, was 73,142. By 2000, the population had increased to 81,607. Write and solve an equation to find, the increase in Cheyenne’s population from 1990 to 2000. Mercury’s surface temperature has a range of 600

asked by Crystal on September 19, 2013
20. ## Chem

If the initial pressure of HD(g) is 8.913 atm, calculate the % decomposition of HD(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 1000 K is 0.26. The initial pressure of the reaction products is 0 atm.

asked by May on October 2, 2016
21. ## Chemistry please help!

Please help. I have no idea how to do these 4 homework problems. 1- How many milliliters of 0.140 M HCl are needed to completely neutralize 42.0mL of 0.106 M Ba(OH)2 solution? 2-How many milliliters of 0.123 M H2SO4 are needed to neutralize 0.250 g of NaOH

asked by Robert on February 22, 2010
22. ## pre algebra

f(x)=9x+7 The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined. help why is the answer negative infinity, infinity? thank you so much...please

asked by mark on October 25, 2017
23. ## science

Acetic acid (CH_3COOH) is a weak acid. a) Write the symbolic equation showing the ionisation of acetic acid. b)Given that an acetic acid solution of pH 4.8 has a hydrogen ion concentration of 1.58 * 10^-5 mol L^-1, what is the concentration of the acetate

asked by anonymous on January 19, 2018
24. ## algebra

3x + 4 > 9, with x = 2 determine whether or not the solution provided is a solution to the inequality. If the value he or she provides is a solution, provide a value that is not a solution. If the value is not a solution, provide a value that is a

asked by Sam on February 14, 2011
25. ## Physics

A cylindrical container 1.5m tall contains mercury to a certain depth, d. The rest of the cylinder is filled with water. If the pressure at the bottom of the cylinder is two atmospheres, what is the depth d? I used this equation: 2atm = 1atm + (density of

asked by Lhaedy on December 11, 2013
26. ## Chemistry

Give the enthalpy change and entropy change values shown below calculate the free energy change for this reaction at 25 degrees C using Gibbs free energy equation. How does this value compare to the free energy change using the standard free energy of

asked by Christian on May 16, 2007
27. ## Algebra

The costs of doing business for a company can be found by adding fixed costs, such as rent, insurance, and wages, and variable costs, which are the costs to purchase the product you are selling. The portion of the company’s fixed costs allotted to this

asked by Kris on August 4, 2008
28. ## Chemistry

Calculate soln pH if 100 mL 0.10 M Na2S is mixed with 200 mL 0.050 M HCl. The hint is consider Kb for HS^-. The answer is pH=9.74. Can someone walk me through the neccessary steps to get this answer? What are the k1 and k2 values for H2S in your text?

asked by John Peterson on May 23, 2007
29. ## chem

Kw = KaKb. With this equation you can convert any Ka to Kb and the reverse. Codeine (Cod), a powerful and addictive painkiller, is a weak base. a) Write a reaction to show its basic nature in water. Represent the codeine molecule with Cod. b) The Ka for

asked by DrBob222 on April 28, 2007
30. ## 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
31. ## Physics(Please help, thank you)

I had to do an experiment where a tiny steel ball was measured using a micrometer. There was then a series of calculations that needed to be completed and then a percent error had to be calculated. I think that my data may be incorrect or maybe I am just

asked by Hannah on August 30, 2012
32. ## Maths

For the transformation w=z^2, find the locus of w when z lies on the imaginary axis. I thought the locus would be a line along the real axis as I thought w= r^2 or -r^2 but the book says it has argument pi which would mean only on the negative real axis ie

asked by Jake on February 24, 2007
33. ## Chemistry Lab

You are given 350 mL a stock solution of 1.66E-02 M benzoic acid, MW = 122.125 g/mol. Answer the following questions. A. What is the number of moles present in the original stock solution? B. You need to dilute the benzoic acid stock solution to 1.24E-03

asked by Natasha on January 11, 2011
34. ## Chemistry Lab

You are given 350 mL a stock solution of 1.66E-02 M benzoic acid, MW = 122.125 g/mol. Answer the following questions. A. What is the number of moles present in the original stock solution? B. You need to dilute the benzoic acid stock solution to 1.24E-03

asked by Natasha on January 11, 2011
35. ## MATH HELP SOMEONE

For questions 1 and 2, choose the equation that you can use to solve the problem. 1. 86 is 45% of what number? (1 point) • 86 = 0.45n • n = 0.45 × 86 • 0.45 = n × 86 • 86 = 45n 2. What percent of 26 is 4? (1 point) • 0.26 = n × 4 • n = 0.26

asked by Polka Dot on December 7, 2015
36. ## math

Hi, I was working on my math homework and I was stumbling on these problems. I wanted to double check my answers that I have; I also could not answer 5. If vectors O(0,0,0), A(6,0,0), B(6,-sqrt(24), sqrt(12)), and C(0,-sqrt(24), sqrt(12)) form a square. 1)

asked by greg on April 19, 2017
37. ## Chemistry

In a study of the following reaction at 1200K it was observed that when the equilibrium partial pressure of water vapor is 15.0 torr, the total pressure at equilibrium is 36.3 torr. 3Fe(s)+4H2O(g) (reversible arrows) Fe3O4(s)+4H2(g) Calculate the value of

asked by Taasha on July 30, 2007
38. ## Physics (please help)

A sinusoidal wave travels along a string. The time for a particle to move from maximum displacement to zero is 0.170s. What are the a)period b)frequency c) the wavelength is 1.40m what is the wave speed? ok I know i need the equation T=1/f and the wave

asked by susane on February 4, 2007
39. ## Grade 11 math - HELP!

Skyscrapers sway in high-wind conditions. in one case, at t=2s, the top floor swayed 30cm to the left (-30cm), and at t=12, the top floor swayed 30 cm to the right (+30cm) of its starting position. a) what is the equation of a sinusoidal function that

asked by Allison on December 21, 2010
40. ## Mathematics

1. Show that Sin3 Theta - Cos2 Theta = (1 - Sin Theta)(4Sin^2 Theta + 2Sin Theta - 1). Without using a calculator, show that Theta = 18 degrees is an exact solution of the equation Sin3 Theta = Cos2 Theta. Justifying your answer, find the exact values of:

asked by Edwards on August 3, 2011
41. ## chemistry

The reaction between sodium hydroxide and hydrobromic acid is represented in the equation below: OH- + H+ -> H2O A 62.5 mL sample of 1.86 M NaOH at 22.5 deg Celsius was mixed with 62.5 mL sample of 1.86 M of HBr at 22.5 deg Celsius in a coffee cup

asked by lola on November 2, 2014
42. ## CHEMISTRY QUESTION

Imagine you have a light bulb and battery conductivity tester. You are given a dilute solution of copper sulfate and a dilute solution of vinegar, acetic acid. Coppersulfate is an ionic compound. You may recall acetic acid reacts with water to produce ions

asked by ALISHA on January 9, 2007
43. ## macroeconomics

suppose that congress enacts a significant tax cut with the expectation thatthis action will stimulate sggregated demand and puch the real gdp in the short run. in gact, however, neither real gdp now the price level changes significantly as a result of the

asked by aimee on September 15, 2010
44. ## Physics--Please Help!!

A bullet of mass m=0.060 kg hits a 5.0 kg block with an initial speed of 225 m/s. The block is connected to a spring that is attached to a wall. The friction between the block and the table is negligible. Upon impact, the bullet bounces back from the box

asked by Rob on October 28, 2012
45. ## Physics... Help!

A bullet of mass m=0.060 kg hits a 5.0 kg block with an initial speed of 225 m/s. The block is connected to a spring that is attached to a wall. The friction between the block and the table is negligible. Upon impact, the bullet bounces back from the box

asked by Rob on October 28, 2012
46. ## chemistry

if the average concentration of PCBs in the body tissue of a human is 4.0 ppm, what mass of the PCB is present in a 64 kg person? is this a significant amount in regards to the health of the person? What is the concentration of a solution of sodium nitrate

asked by Anonymous on January 11, 2015
47. ## chemistry

if the average concentration of PCBs in the body tissue of a human is 4.0 ppm, what mass of the PCB is present in a 64 kg person? is this a significant amount in regards to the health of the person? What is the concentration of a solution of sodium nitrate

asked by Anonymous on January 11, 2015
48. ## Math

For what real number k does the product (25 + ki)(3+2i) equal a real number? I tried dividing by i. So I got: ((25/i)+k)((3/i+2) which would equal (-25i+k)*(-3i+2) which means k would=25i. I don't think that's right but can you guys check it?

asked by Isaber on October 8, 2017
49. ## algebra homework

f(x) and g(x) are monic quadratic polynomials that satisfy the following conditions: f(x)=0 has real distinct roots a1 and a2. g(x)=0 has real distinct roots b1 and b2. {f(b1),f(b2)}={b1,b2}. (set of f(b1),f(b2) is same as b1, b2) {g(a1),g(a2)}={a1,a2}.

asked by nanoguai on September 24, 2013
50. ## Macro Help

Calculating Marginal Propensity to Save and Marginal Propensity to Consume Consider the following table. For this hypothetical economy, the marginal propensity to save is constant at all levels of real GDP, and investment spending is autonomous. There is

asked by animal on May 12, 2008
51. ## maths

For the transformation w=z^2, find the locus of w when z lies on the imaginary axis. I thought the locus would be a line along the real axis as I thought w= r^2 or -r^2 but the book says it has argument pi which would mean only on the negative real axis ie

asked by Jake on February 23, 2007
52. ## geometry

I honestly need help on this question. Determine whether statement(3)follows from statements(1)and(2)by the law of detachment or law of syllogism.If it does,state which law was used.If it does not,write invalid. (1)If n is an integer,then n is a real

asked by stef on September 13, 2012
53. ## Economics

1. What effect would a decrease in consumer savings have on the aggregate demand curve? The curve would level off. The curve would shift to the right. The curve would shift to the left. The curve would not change 2. If there is an increase in aggregate

asked by Chris on September 19, 2009
54. ## Algebra

How can you tell if an equation is quadratic and not linear? Quadratic equations contain a term that is squared (such as x^2). Linear equations are of the form y = mx + b, where m and b are constants. the variable in a quadratic equation must be squared

asked by Jess on July 11, 2007
55. ## math

how do you solve this problem? 1/2x - 3 = -1 Let me make sure I understand the problem. Do you mean (1/2)x - 3 = -1, i.e. .5x-3 = -1?, or 1/(2x) - 3 = -1 I'm going to suppose you mean the first one. There is one very simple, but very important postulate of

asked by vicki on August 31, 2006
56. ## physics

a.)At rest, a car's horn sounds at a frequency of 410 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 381 Hz. What is the speed of the car? b.)Is

asked by sanchi on August 5, 2007
57. ## algerbra

mrs. johnson is 3 times as old as her son. ten years agoe she was 5 times as old as her son was then. what is the two equations for this problem? let x = son's age and y = Mrs. Johnson's age. ============================ y=3x is one equation. 10 years ago

asked by shay on December 4, 2006
58. ## secant line, tangent line

f(x) = sqrt(x-1), 1

asked by Jen on October 28, 2006
59. ## math

Lucas is designing a flower garden in the shape of an isosceles right triangle. He has created a scale diagram. The lengths of the perpendicular sides in the scale diagram are 7 cm, and the hypotenuse of the real garden will be 3 m long. What is the area

asked by shade on June 20, 2016
60. ## Math(Please check answers)

1) Solve the equation: 15(7x-6) = 3x-5 My answer is (-85/108) 2) Mary and her brother collect coins. Mary has 4 times the number of coins that her brother has. Together they have 175 coins. How many does Mary have? My answer is 140 3) Perform the indicated

asked by Hannah on September 5, 2010
61. ## Math .. Please help Reiny

A group of 25 eight graders went to collect 300 blankets to donate to victims of super storm Sandy. If each student collects 7 blankets on the first day, how many more blankets will each student need to collect to reach their goal. Answer must include a

asked by Sunshine on November 29, 2012
62. ## Algebra

The life expectancies for men and women in the United States can be approximated by the following formulas: Women: E= 0.126t+76.74 Men: E=0.169t+69.11 where E represents the length of life in years and t represents the year of birth,measured as number of

asked by kim on March 11, 2012
63. ## Math

I keep getting 130gm for the answer!! Supposed to be 129.9 (I know it will round up, but rounded up is not the answer) I just need to know A pharmacy has 325 mL of a 40% solution in stock. 120mL of sterile water is added to the solution to decrease the

asked by Rayne on September 30, 2015
64. ## ALGEBRA

Landscape Design Landscape designers often use coordinate geometry and algebra as they help their clients. In many regions, landscape design is a growing field. With the increasing popularity of do-it-yourself television shows, many homeowners are becoming

asked by Julia on August 21, 2010
65. ## Statistics

The effect size in this hypothetical trial (2.7 fewer infections per 1000 vaccinated) is slightly smaller than the effect size found in the real 2009 HIV vaccine trial (2.8 fewer infections per 1000 vaccinated); so why is the p-value smaller? The

asked by Rupal on July 15, 2013
66. ## Trigonometry

At the ocean, it is known that the tide follows a trigonometric path. At high tide, the water comes in to a point 1 meter from where I placed a flag. At low tide, the water comes in to a point 11 meters from the same flag. The time it takes from to get

asked by Fred on August 15, 2010
67. ## Calculus

a) A boat is pulled into a dock by a rope attached to the bow ("front") of the boat and passing through a pulley on the dock that is 1m higher than the bow of the boat. If the rope is pulled in at a rate of 1m/s, how fast is the boat approaching the dock

asked by Web7 on November 2, 2011
68. ## Algebra

100mL of a solution contains 30 mL of acid; this is called a 30% acid solution because part 30 ---- = ---- = 0.30. whole 100 How many milliliters of acid x would need to be added to the solution to turn it into a 50% solution ? (HInt: Adding acid increases

asked by Stacey on October 23, 2013
69. ## Solving Rational Equations

100mL of a solution contains 30 mL of acid; this is called a 30% acid solution because part 30 ---- = ---- = 0.30. whole 100 How many milliliters of acid x would need to be added to the solution to turn it into a 50% solution ? (HInt: Adding acid increases

asked by Stacey on October 23, 2013
70. ## college algebra

a chemist needs to prepare 28 ounces of a 8% hydrochloric acid solution. find the amount of 14% solution and the amount of 7% solution he should mix to get this solution.

asked by anna on April 20, 2015
71. ## Algebra 1 check answers

If you were solving a system of equations and you came to a statement like 1 = 3, what do you know about the solution to the system? The solution is (1, 3). The solution is x = 1 and y = 3. There is no solution. There are infinitely many solutions. I think

asked by Anon on December 1, 2015
72. ## Chemistry

A 63 gram block of an unknown metal at 88 degrees C was dropped into an insulated flask containing approx. 30 g of ice and 30 g of water at 0 degrees C. After the system had reached a steady temp. it was determined that 12.1 g of ice had melted. What is

asked by Lindsay on May 15, 2007
73. ## Algebra 1- A few questions, please help

**

asked by basketball&batman on December 1, 2015
74. ## Science- Chemistry

How do I figure these out? A solution of sodium thiosulfate, Na2S2O3, is 0.1365 M. 29.28 mL of this solution reacts with 39.79 mL of I2 solution. What is the molarity of the I2 solution? 2(Na2S2O3) + I2↔Na2S4O6 + 2(NaI) 16.77 mL of the I2 solution from

asked by Whitney on November 8, 2012
75. ## Chemistry Pleasee Help

Can you please help me with these problems, I followed the textbook but i am still not getting the write balanced equations.I am not sure if it is the phases or my balancing, or if i got the right answers and not submitting it correctly Please I really

asked by George K. on October 5, 2010
76. ## Chemistry

If a solution of sodium hydroxide is mixed from a 3M solution of sodium hydroxide, such that the volume of the original solution is 50ml and the volume of the final solution is 150ml, determine each of the following: a. The volume of water added to the

asked by Ece on December 28, 2012
77. ## Applied Math - Cosine Periods)

Trying to decypher something, and am getting fouled up with the radians definition of periodicity. Problem: Average temperatures vary over a one year period, or 365 days. Highest temperature = 5 C, lowest = -37 C. Lowest temperature is on day = 20, highest

asked by Robert (RACookPE1978) on March 3, 2013
78. ## Math (check my work)

Angle A measures (x + 13) °. Angle B is complementary to angle A and measures (2x +23) °. a. Write and solve an equation to find the value of x. Not sure how to write the equation but the value of x = 18 b. What are the measures of angle a and angle b?

asked by Isabelle on May 19, 2016
79. ## maths

In the lab, Teresa has two solutions that contain alcohol and is mixing them with each other. She uses 4 times as much Solution A as Solution B. Solution A is 17% alcohol and Solution B is 10% alcohol. How many milliliters of Solution B does she use, if

asked by ward on March 21, 2017
80. ## MATH

1. Which of these numbers can be classified as both real and rational? 1/2 -1.016879413894 Square root: 5 0.89089908999 2.Which is both a real number and an integer? Square root 7 0.15 -15 1/3 3. What is an example of an irrational number? Sqre root:

asked by Shalee ^~^ on October 21, 2015
81. ## Algebra 1 ( bobpursley)

1. Write an equation in slope-intercept form for the line that passes through (5,0) and is perpendicular to the line given by y = -5/2x + 6. A: m = 2/5 y = mx + b 0 = (2/5)(5) + b 0 = 2 + b b = -2 y = 2x/5 -2? 2. Write an equation in slope-intercept form

asked by Please, help me! This is urgent! on December 3, 2013
82. ## physics

A steel rod of length 4 m is welded to the end of an aluminum rod of length 3 m (lengths measured at 23 °C). The combination rod is then heated to 198 °C. What is the length of the combination rod at 198 °C? (The linear expansion coefficients for steel

asked by sima on April 4, 2012
83. ## physics

Hi i'm doing that lab were you attach a weight to a tape which is also through a timer that puts marks on the tape at a given time interval ok I'm asked why is gravity different than on Earth? I don't rember the physics answer behind it I remeber Fg =

asked by physics on August 13, 2009
84. ## physics

We have to do a lab in physics where we research and write on real life applications of momentum, the guidelines we have are Research Assignment: Application of Momentum in Real-Life Situations Task: Choose any real-life situation where the concept of

asked by Al on March 24, 2015
85. ## ap calculus

The height s of a ball, in feet, thrown with an initial velocity of 112 feet per second from an initial height of 6 feet is given as a function of time t (in seconds) by s(t)=-16t^2+112t+20. 1. What is the maximum height of the ball? 2. At what time does

asked by muffy on September 18, 2009
86. ## Math stem question

The main span of a suspension bridge is the roadway between the bridge's towers. The main span of the Walt Whitman Bridge in Philadelphia is 2000 feet long. This is 600 feet longer than two-fifths of the length of the main span of the George Washington

asked by Kennedy on January 12, 2015
87. ## math

The main span of a suspension bridge is the roadway between the bridge's towers. The main span of the Walt Whitman Bridge in Philadelphia is 2000 feet long. This is 600 feet longer than two-fifths of the length of the main span of the George Washington

asked by Kennedy on January 12, 2015
88. ## social studies

how do we really know if the stuff in the S.S book is really real.we don't know because we wasn't there Most of it is true. Resercher and other have worked many years and by using technonly and other eveidence have figured out how people lived and ect. So

asked by savannah on November 29, 2006
89. ## Macroeconomics

Describe how each of the following will affect the equilibrium price level(P) and real output(Y) in the short run(Assume the economy is initially in the long-run equilibrium.) (a) A reduction in the real interest rate (b) A widespread fear of deep

asked by Cody on June 19, 2012
90. ## Chemistry

Determine the volume, in milliliters, required to prepare each of the following diluted solutions. 40.0mL of a 2.75M KNO3 solution using a 1.00M KNO3 solution 45.0mL of a 2.90M H2SO4 solution using a 6.00M H2SO4 solution 0.700L of a 2.10M NH4Cl solution

asked by Chan on April 7, 2015
91. ## Math

Can you please check my work since my professor wont. Thanks 50% of 45 solution=90 Predict the height of a woman who's humerus is 40 cm long using H(x)=2.75x+71.48 solution= 181.48cm Trains A and B are traveling in the same direction on parallel tracks.

asked by Mio on March 23, 2011
92. ## math

To rent a home water softnener, there is an installation fee of \$60 plus a \$ 25 monthly fee. Write a linear equaion to represent the total cost, y, of renting a water softener for x months. Use th linear equation to compute the cost of renting the water

asked by Javeria on October 15, 2011
93. ## Algebra 116 Help Please

Buying a Home For most people, buying a house is a great investment that can offer security in an uncertain world, but buying a house is also a commitment. Application Practice After putting your name on this document, above, answer the following

asked by Sydney on September 8, 2010
94. ## Calculus

use the intermediate value theorem to prove that every real number has a cubic root. That is, prove that for any real number a there exists a number c such that c^3=a

asked by not so master on October 21, 2012
95. ## DrBob222

These are the other equations I've balanced. I need help with one. AgNO3 + K2Cr2O7 --> double replacement AgNO3 + K2Cr2O7 --> AgCr2O7 + K2NO3 Please tell me if I've balanced these right. Br2 + NiI3 --> single replacement, element is a non-metal Br2 + NiI3

asked by Derrick on July 15, 2010
96. ## College Algebra--Still Confused

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational

asked by Krissy on February 5, 2013
97. ## College Algebra

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational

asked by Kristen on February 4, 2013
98. ## Pre-Calculus

The Richtr scale was evied y Cahrles F.Richter a American geologist. The scale is based on the equation M(x)=logx/x0(little 0), where x is the seismographic reading of the earthquake and x0 i 1 miron 0.001mm (the seismographic reading of a zero-level

asked by Andy on December 21, 2009
99. ## CHEMISTRY-For Dr.Bob

My chem class just finished a lab in which the objective was to find the percentage of silver and barium in a nitrate salt mixture by precipitating the chromates, separating out the precipitate from the solvent and spectator ions via filtration, and

asked by Catie on January 29, 2008
100. ## math

The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8 Write this equation in function notation.

asked by james on March 12, 2012