# 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 44
1. ## chemistry

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 g of Mg and 146.0 g of

asked by Anonymous on July 11, 2016
2. ## CHEMISTRY

I see you took my advice literally about carrying extra places. It isn't necessary to use ALL of those numbers that show up on your calculator. I think 1.5377X + 1.8447Y = 0.944 will be quite sufficient and I suspect even one number fewer still will work

asked by Catie on January 29, 2008
3. ## Chemistry

If a solution containing 52.044 g of mercury(II) chlorate is allowed to react completely with a solution containing 15.488 g of sodium sulfate, how many grams of solid precipitate will be formed? How many grams of the reactant in excess will remain after

asked by Chelsea on October 13, 2013
4. ## science

The following chemical equation shows the incomplete formula for burning methanol. The question mark represents the unknown number of oxygen (O2) molecules. How many molecules of O2 are needed to balance this chemical equation? 2CH₃OH + ?O₂ > 2CO₂ +

asked by help on February 13, 2019
5. ## chemistry

The following chemical equation shows the incomplete formula for burning methanol. The question mark represents the unknown number of oxygen (O2) molecules. How many molecules of O2 are needed to balance this chemical equation? 2CH₃OH + ?O₂ > 2CO₂ +

asked by Avery on February 5, 2018
6. ## chemistry

Write and balance the equation for the reaction between nitric acid and potassium iodide. The products are potassium nitrate, iodine, nitrogen monoxide, and water. 2HNO3 + KI = KNO3 + I + 2NO + H2O (Did I write the equation correctly?)

asked by Kat on April 14, 2016
7. ## Calculus

"I would like to integrate the following equation. It is a chemical rate equation (Arrhenius) where I have temperature & relative humidity as functions of time. Both are sinusoidal, reflecting a typical yearly climate": e^-(Integral(k*RH(t))dt), where

asked by A51AN on March 6, 2008
8. ## Chemistry

CONSIDER THE FOLLLOWING UNBALANCED REDOX EQUATION: IO3^-(AQ) + Al(S)-->I2(S) + A;^3+(AQ) A. WHAT IS THE OXDATION NUMBER OF IODINE IN THE IODATE ION? I GOT IO3^6(AQ)? B. WHICH SPECIES IS THE REDUCING AGENT I GOT AL^3+(AQ) C. USING THE OXIDATION AND

asked by PAM on November 30, 2011

help w/ problem plz.. Tell what situation is shown, write an equation, & solve the problem.. amanda has 63 bracelets. she decides to divide equally among her 7 friends. How many does she give each friend? Situation:_______(what is this?) Equation:___63/7=9

asked by litzy on August 12, 2010
10. ## chemistry

Enter a chemical equation for the ionization in water of CH3CH2COOH. Is the acid strong or weak? Select the Lewis structure for the ion formed by the acid when it ionizes. Chemical equation: Note: Include physical states.

asked by y on November 9, 2015
11. ## Chemistry

ZnCl2(aq)+Na2CO3(s)--> ZnCO3(s)+NaCl (aq) Balance the chemical equation and state solid, liq, gas, aq properly to each compound Ok I have it balanced by 2 NaCl in the second part of the equation But now what is the total ionic and net ionic equations?

asked by Ashley on November 30, 2011
12. ## chemistry

write a balanced equation for photosynthesis. express the answer as a chemical equation. identify all of the phases in the answer. during photosynthesis, plants use energy from sunlight to form glucose (C6H12O6(s)) and oxygen from carbon dioxide and water

asked by jen on October 25, 2011
13. ## science

The following chemical equation shows the incomplete formula for burning methanol. The question mark represents the unknown number of oxygen (O2) molecules. How many molecules of O2 are needed to balance this chemical equation? 2CH₃OH + ?O₂ > 2CO₂ +

asked by help pls on February 13, 2019
14. ## chemistry

The following molecular equation represents the reaction that occurs when aqueous solutions of lead(II) nitrate and magnesium chloride are combined. Pb(NO3)2 (aq) + MgCl2 (aq) PbCl2 (s) + Mg(NO3)2 (aq) Write the balanced net ionic equation for the

asked by kammy on March 3, 2014
15. ## Chemistry

0.400 g of a solid base X(OH)2 was dissolved in 50.0 mL of water. The solution was neutralized with 65.80 mL of 0.150 mol/L HCl. Calculate the molar mass of the base. Do I need to set up a dilution equation? I'm not sure what to do.

asked by Anon on December 2, 2015
16. ## Chemistry

Explain with a chemical equation why the pH of the salt solution is or is not the same as pure water: NaCl, NaC2H3O2, NH4Cl We're working with salt and buffer solutions but the equations confuse me the most. Anything helps!!

asked by ryancon on October 3, 2018
17. ## Algebra

i have this question i have been working on two days no and cannot get the correct solution. I am to write and equation of the line containin the given point and parallel to the given line. I put my answer in the form of y=mx+b and I keep getting y= 7x+1

asked by Amanda R on September 7, 2010
18. ## Chemistry

Assuming the solution you used was 95% ethanol by volume and that the density of ethanol is 0.816g/mL, how much water and carbon dioxide are produced in the experiment? Equation: C2H6O+3O2-->2CO2+3H2O

asked by BUTCHER on April 19, 2016
19. ## Chemistry-Help Dr. Bob222

If a weak acid has a dissociation constant of 6.4 x 10^-6, what is the pH of a solution of this acid in a 0.10 molar concentration? I still don't understand the equation you gave me. My textbook doesn't break it down like this, so I'm confused as to where

20. ## chemistry

When the following redox equation is balanced with smallest whole number coefficients, the coefficient for the hydrogen sulfate (HSO4-) ion will be ______ . Al + HSO4- + OH- --> Al2O3 + S2- + H2O (basic solution)

21. ## chemistry

Balance each of the following redox reactions occurring in acidic aqueous solution.Express your answer as a chemical equation. Identify all of the phases in your answer. Zn(s) + Na(aq)-> Zn2+(aq)+Na(s) Cl-(aq) + 2NO3-(aq)->NO(g)+Cl2(g)

asked by redgy on April 23, 2011
22. ## chemistry

What about this question? Calculate the mass (g) of PbSO4 that will dissolve in 2000 mL of 0.0694 M K2SO4 solution. The equation represents the solubility process. PbSO4 (s) Pb2+ (aq) + SO42- (aq) Ksp = 1.7 x 10-8

asked by Confused on October 16, 2010
23. ## maths

Solve the equation using the multiplication principle. -35 = 7k Solve the equation. clear fraction and decimal first. 2.(y-7)- (y+4)) = 6y 3. -5b - 8 = -5 - 2b - 1b Problem one: multiply both sides of the equation by 1/7 Problem two: I will be happy to

asked by francis on October 12, 2006
24. ## Phoenix

In planning for a new item, a manufacturer assumes that the number of items produced x and the cost in dollars C of producing these items are related by a linear equation. Projections are that 100 items will cost \$10,000 to produce and that 300 items will

asked by Sarah on April 11, 2007
25. ## Physics

A man stands on the roof of a 15m tall building and throws a rock with a velocity of magnitude 30m/s at an angle of 33deg above the horizontal. Ignore air resistance. Calculate: a) the maximum heigh above the roof reached by the rock b) the magnitude of

asked by Kyle on September 26, 2011
26. ## Basic Calculus-Optimization Problems

Hello, please help me. There is a question where I have to optimize the area of a field that is being fence in like this: [|] i.e. two rectangle fields, side by side: area= 2x by y. I get to use 200ft of fencing. From that diagram and the amount of fencing

asked by mary on March 16, 2012
27. ## Math

Could someone please check my questions? My answers are under the questions... and any help will be greatly appreciated 33. Jane works at the public library after school. She makes \$7.00 per hour. She cannot work more than 15 hours per week. If y = 7x

asked by Abby on October 17, 2015
28. ## math

Could someone please check my questions? My answers are under the questions... and any help will be greatly appreciated 33. Jane works at the public library after school. She makes \$7.00 per hour. She cannot work more than 15 hours per week. If y = 7x

asked by Abby on October 17, 2015
29. ## algebra

The weight of an object follows the equation w=Cr^-2, where C is the constant and r is the distance the object is from the center of the earth. a. solve the equation for r. b. Suppose the object is 100 pounds when at sea level. Find the value of C that

asked by Carson on March 6, 2010
30. ## ALGEBRA

The profit made from the sale of tiles is found by subtracting the costs from the revenue. e. Find the Profit Equation by substituting your equations for R and C in the equation . Simplify the equation. f. What is the profit made from selling 20 tile sets

asked by AMERICAN GIRL on June 23, 2011
31. ## calculus

Could somebody please check these for me? Solve the differential equation with the given initial solution. 1. (dy/dx)=(-y/3) for y(0)=10 my answer was y=10e^(-x/3) 2. dP/dt=P+4 for P(0)=100 my answer was P=104(e^t)-4 3. dz/dt=te^z for z(0)=0 my answer was

asked by tia on April 14, 2008
32. ## calculus

Could somebody please check these for me? Solve the differential equation with the given initial solution. 1. (dy/dx)=(-y/3) for y(0)=10 my answer was y=10e^(-x/3) 2. dP/dt=P+4 for P(0)=100 my answer was P=104(e^t)-4 3. dz/dt=te^z for z(0)=0 my answer was

asked by tia on April 16, 2008
33. ## math,algebra

what is the difference and similarities if solving an equation with varibles in the equation if it had 1 or 2 or even 3 variables? Here is one: Money left in Wallet= money earned + money found - money lost - money spent. I don't understand? can you please

asked by jasmine20 on January 13, 2007
34. ## math

How do you solve system of equations and tell if they're consistant and independant,consistant and dependent,and inconsistant? If you find no solutions then the system is inconsistent. Suppose you have N variables and M equations (N larger than or equal to

35. ## Chemistry

How many grams of dry NH4Cl need to be added to 2.10L of a 0.600M solution of ammonia,NH3 , to prepare a buffer solution that has a pH of 9.00? Kb for ammonia is 1.8x10^-5. I just wanted to make sure I dd this write, can you please check my work? Thank

asked by Jessica on October 8, 2011
36. ## chemistry

HELP PLEASE... what is the chemical equation for these situations..? a) there is a straight iron nail in the solidified gelatin solution. the gelatin solution was prepared with phenolphthalein and K3Fe(CN)6. b) same scenario as with (a) but the nail is

asked by Anonymous on January 11, 2011
37. ## chemistry

HELP PLEASE... what is the chemical equation for these situations..? a) there is a straight iron nail in the solidified gelatin solution. the gelatin solution was prepared with phenolphthalein and K3Fe(CN)6. b) same scenario as with (a) but the nail is

asked by Anonymous on January 11, 2011
38. ## chemistry

what is the chemical equation for these situations..? a) there is a straight iron nail in the solidified gelatin solution. the gelatin solution was prepared with phenolphthalein and K3Fe(CN)6. b) same scenario as with (a) but the nail is bent c) same with

asked by princess on January 11, 2011
39. ## chemistry

HELP PLEASE... what is the chemical equation for these situations..? a) there is a straight iron nail in the solidified gelatin solution. the gelatin solution was prepared with phenolphthalein and K3Fe(CN)6. b) same scenario as with (a) but the nail is

asked by princess on January 11, 2011
40. ## economics

Consider an economy with the production function L^(1/3) a) Derive the Labor demand Curve b) If Labor supply curve is L^s= (w/p), calculate the equilibrium levels of real wage, labor and output. c) Assume M^s= 45 and k=3 . What is the equation of the

asked by josh on March 27, 2011
41. ## algebra

1. The formula V=lwh is used to find the volume of rectangular prisms. Which equation solves for w? a. w=V-l-h b. w=Vlh c. w=lh/V D. w=V/lh 2. Mr. Marsupial invested \$8,000, part at 6% interest and the reamainder at 8% interest. At the end of the first

asked by Yaya on March 18, 2012
42. ## Cemistry

Hi, I've been trying to solve this chemical equation for the last 30 minutes and am only confusing myself. I am wondering if the product I obtained is correct. The question is to write a balanced equation for the below reaction and be sure to indicate the

asked by Julie on March 16, 2012
43. ## substitution and elimination methods

Can someone please help explain this, my notes aren't helping me much. Given the following system of linear equations: {x-4y=20 -3x+4y=-12 The solution to the system is: The system is: The equation is: Please help

asked by Carlos on April 7, 2017
44. ## Pre-Algebra

a student solved the equation x/4 +5=1 without showing all the work. the student's solution is incorrect. what error did the student make?

asked by taylor on February 8, 2012
45. ## math

a student soved the equation x/+5=1 without showing all the work. the student's solution is incorrect. what error did the student make?

asked by taylor on February 8, 2012
46. ## maths

find the general solution of the following first order differential equation. dx/d(theta)=(xtan(theta))-(cos(theta))

asked by Markus on October 26, 2011
47. ## Algebra

Name the property of real numbers illustrated by the equation. -4(x + 3) = -4x - 12 A. Associative Property of Multiplication B. Associative Property of Addition C. Distributive Property D. Commutative Property of Addition B or A ? I think its B

asked by Ciaria on March 15, 2015
48. ## chemistry

So I posted this question yesterday and was told I had a few typos.... I fixed them and here is the question again... Please help me!!! A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The

asked by amy on January 5, 2010
49. ## DanH-Algebra 1

Solve the system of equations using the Addition method. 2a + 3b = -1 3a + 5b = -2 Margie: Roger's answer below is correct. If you don't understand it, please try and tell us what you don't understand. He makes it sound so strange can you ask him to

asked by Margie on October 14, 2006
50. ## Mathematics

find the general solution of the following first order differential equation. dx/d(theta)=(xtan(theta))-(cos(theta)) show working

asked by markus on October 26, 2011
51. ## math, finite mathematics

My question is that i need help for this problem understanding how they came about to the answer it is an odd problem so: The answer they have is: 18 cakes for the first one. 8 cakes for the second one. 2 cake for the third one. Here is the original

asked by student on June 17, 2007
52. ## Macroeconomics

If the GDP deflator increased by 3 percent while nominal GDP grew by 5 percent: a) real GDP would grow by 2 percent. b) real GDP would grow by 8 percent. c) real GDP would be unchanged. d) real GDP would fall by 3 percent. My attempt to get the solution:

asked by Kid on September 20, 2018
53. ## Physics

A weight with mass m lies on a surface with no friction. The weight is also connected to a spring with springconstant k and then the weight is driven with outer force F(t)=F0sin(Ωt). There is a friction in the spring and he‘s described with –bv(t).

asked by Amber on November 16, 2011
54. ## algebra

How do you write a real-world scenario that could be represented by the inequality 4x + 2y 40 and how are you supposed to choose one ordered pair that is a solution to the given inequality and explain what that ordered pair means in the context of your

asked by Ka'Sandra on August 11, 2010
55. ## Algebra 1

can anyone help! I have no clue how to do this.. PART 1: Use complete sentences to describe a real-world scenario that could be represented by the inequality 5x + 2y 45. PART 2: Choose one ordered pair that is a solution to the given inequality and explain

asked by Vee on February 6, 2011
56. ## Algebra 1- Virtual School

can anyone help! I have no clue how to do this.. PART 1: Use complete sentences to describe a real-world scenario that could be represented by the inequality 5x + 2y 45. PART 2: Choose one ordered pair that is a solution to the given inequality and explain

asked by Vee on February 6, 2011
57. ## Chemistry

Consider a saturated solution of calcium fluoride in 0.086 M potassium nitrate. Complete the following tasks, and then answer the question. a) Write the chemical equation corresponding to Ksp. b) Write the defining expression for the thermodynamic

asked by Ashley on October 7, 2012
58. ## Math

Could someone please help me solve this problem, the age numbers that I am working with are 10yrs old 55yrs old and 75yrs. old. I need to know at my age of 55, in years, how old was the older person of 75 when I was born? Could you please write an equation

asked by Chris on February 3, 2011
59. ## math

Kim made five times as many cookies as Andrea. If Andrea made Δ cookies, write an expression describing how many cookies Kim made. A) Δ+ 5 B) Δ - 5 C) 5×Δ D) Δ÷5 5) Look at the graph of the equation y = 5x. Which statement is true? A) As x increases

asked by Anonymous on September 17, 2018
60. ## Chemistry

what volume of .422 M NaOH must be added to .500L of .300 M acetic acid to raise its ph to 4.00 i know you have to use the henderson hasselbalch equation but im not sure which values i would use for the concentration portion of the equation. would i have

asked by Sean on March 4, 2017
61. ## Math

Factor the polynomial P(x)=x^3-2x^2-13x-10. Then solve the equation P(x)=0. This is what I got: P(x)=(x+1)(x^2-3x-10) P(x)=(x+1)(x-5)(x+2) When it says solve the equation P(x)=0 does it means solve for x? If so then x=-1 or 5 or -2 Correct??? please and

asked by Anonymous on April 3, 2012
62. ## math word problems

The sum of two numbers is 69. The second is 9 more than 4 times the first. What are the two numbers? would the equation i have be right 4x+y+9=69 4*15+0+9=69 60+9=69 No. Let the two numbers be x and y, with x the smaller number. x + y = 69 y = 4x + 9 5x +

asked by TAMMY on April 27, 2007
63. ## math

consider the graph of the equation xy=9. rotate the graph 45 degrees clockwise about the center (0,0). what is the equation of the rotated graph?

64. ## science(chem)

I'm making different concentrations of ethanol and I just wanted to check my calculations and method. Making ethanol concentrations of: 0.40% 0.30% 0.20% 0.10% 0.05% To make the 0.40% ethanol from stock solution using 100ml volumetric flask: (xg

asked by ~christina~ on October 1, 2008
65. ## Trigonometry/Geometry - Inequalities

Let a, b, and c be positive real numbers. Prove that sqrt(a^2 - ab + b^2) + sqrt(a^2 - ac + c^2) is greater or equal to sqrt(b^2 + bc + c^2). Under what conditions does equality occur? That is, for what values of a, b, and c are the two sides equal? This

asked by Sam on December 7, 2013
66. ## Math

Apex Plumbing charges a trip fee of \$55 plus \$15 for each quarter hour of service. John wrote an equation using, t , the total cost of a service call, as a function of, h , the number of hours the call lasted. What is the value of the slope in his equation

asked by Dom on May 1, 2012
67. ## Chemistry

Solid sodium carbonate reacts with hydrochloric acid to give sodium chloride,carbon dioxide and water. When writing the ionic equation, do I need to write Na2CO3(s)or do I write CO32-(aq) on the left hand side of the equation?

asked by candy on April 7, 2009
68. ## Chemistry

a. Write and balance the equation for the reaction of calcium carbonate with hydrochloric acid, then answer the following questions. b. What mass of calcium carbonate is required to neutralize 83.5mL of 6.00M HCl? does the balanced equation have any

asked by Anonymous on September 18, 2016
69. ## Math1239

x=4 cost, y= 2 sint on the interval 0 ≤ t ≤ 2π what is the Cartesian equation? nd describe the graph giving the (x,y) co-ordinates ... stating the initial point and the terminal point. ? i found the cartesian equation as y= square root of 4-x^2/4 plz

asked by Mark J on October 26, 2011
70. ## College algebra

A fountain in a shopping mall has two parabolic arcs of water intersecting. The equation of one parabola is y = -0.25x^2+2x and the equation of the second parabola is y=-0.205x^2+4x-11.75. How high above the base of the fountain do the parabolas intersect?

asked by Missy on May 5, 2012
71. ## Physics help

A wave is described by the equation y = (4.5×10−2) sin (1.9x − 3.2t), where lengths are measured in meters and time in seconds. What is the displacement of a particle at position x = 2.7 m at time t = 5.8 s? Note: Remember that the argument of the

asked by Chris on June 15, 2012
72. ## Chemistry

1. net ionic equation for the reaction between silver nitrate and the arsenate ion I got: 3Ag (+) + AsO4 ---> Ag3AsO4 2. net ionic equation for the precipitation of copper hexacyanoferrate (II). I got: 2Cu (2+) + [Fe(CN)6] ---> Cu2 [Fe(CN6)] Can someone

asked by Soojung on July 20, 2009
73. ## Algebra 1

how do i graph x + y = 1 put y on one side y=-x+1 im doing an online test and its asking me to find the equation that matches the graph. But im not sure how to figure it out. well the graph should have a negative slope with 1 as y-intercept look for a

asked by Joel on March 20, 2007
74. ## Algebra

1: Write an equation for the following situation. (2 pts.) --Be sure to define your variables!  --NOTE: You are ONLY writing the equation for this question!  Polly Gone has \$120 saved already. She wants to save for airfare to visit her friend. The

asked by Kaai97 on February 9, 2016
75. ## Math (Calculus 121)

The derivative tells you the slope at any point. df/dx = 8 x^3 - 12 x When x = 3, the slope is m = 8*27 - 36 = 180 and the equation of the tangent line is (y - 228) = 180*(x - 3) y = 180 x - 540 + 228 = 180 x - 312 wow, that was absolutely correct (i just

asked by drwls on February 19, 2007
76. ## Math Help

Directions:Solve and graph equation using words.Then include wether it is solid line or dotted,hoe to graph it,and which side shading is on. Problem:5x+3y>-6 and 27+x-6 and 2y+x-5/3 x-2 draw the dotted line y=-5/3x -2 Notice the equation says y above the

asked by Margie on June 5, 2007
77. ## macroeconomics

Year - 2000 Nominal GDP: 9,817 Real GDP: ___________ GDP Deflator: 1 Inflation 2.2 Real GDP Per capita: _________ Population 283.7 Year – 2001 Nominal GDP: ________ Real GDP: 9,891 GDP Deflator: _________ Inflation 2.4 Real GDP Per capita: _________

asked by Ella on September 23, 2008
78. ## Algebra

This equation is incorrect because when we multiply an exponent into a bracket we multiply it with the exponents of the terms inside the bracket. The correct equation should be: (xy)^3 = x^3y^3

asked by shelly on May 12, 2011
79. ## algebra

Given the linear equation y = 4x + 2, find the y-coordinates of the points (-2, ), (1, ), and (-3, ). Please show all of your work. Plot these points and graph the linear equation.

asked by Sharday on November 1, 2011
80. ## algebra

Given the linear equation y=-3/5x-4, find the y-coordinates of the points (-5, ), (0, ), and (5, ). Please show all of your work. Plot those points and graph the linear equation.

asked by sharday on November 1, 2011
81. ## Maths

A cubic graph has the equation: y = 3(x-1)(x+2)(x+5) Write in similar form the equation of the graph after a translation ( 3) Could you show me step-by step please?

asked by Remy on October 1, 2009
82. ## Calculus

Determine the equation of the tangent line at the indicated -coordinate. f(x) = e^(-0.4x) * ln(18x) for x= 3 The equation of the tangent line in slope-intercept form is

asked by Zoey on November 2, 2014
83. ## Algebra

Given the equation: -0.2xsqrd+12x+11 Use the quadratic equation to determine the last day that tickets will be sold. x=1 is the day tickets go on sale.

asked by Teri on May 29, 2010
84. ## math

Write each equation in slope-intercept form. Underline the slope and circle the y-intercept in each equation. 4y=–6+4x all i got is that the y int. is -3/2 and that is correct

asked by ali on November 3, 2016
85. ## Algebra 2

3Y + 6x = 18 4y – 12x = -16 a.) Get each equation in slope-intercept form. b.) Identify the slope and the y-intercept of each equation. c.) Find the x and y-intercepts of each line.

asked by Jackie on November 2, 2012
86. ## math

1. write the equation in slope-intercept form. what are the slope and y-intercept? -9x+10y=-9 2. what is the graph of the equation? -5x+y=-3 please help on these a.s.a.p thansk guys

asked by ray on September 4, 2013
87. ## Geometry

The equation of a circle is (x−4)^2+ (y+2)^2=16. B) Find the radius of the circle with the given equation. Can somone give me step by step explanations? Thank you in advance!

asked by Jazy on May 25, 2014
88. ## Algebra 1

1. Find the slope of a line that passes through (–2, –3), and (1, 1). A. 1/3 B. 1 C. 2 D. 4/3** 2. For the equation –4y = 8x, what is the constant of variation? A. -4 B. -2** C. 1 D. 2 3. What is an equation for the line with slope and y-intercept 9?

asked by Anonymous on February 21, 2017
89. ## math

Find the equation of the tangent line to the curve y=6tanx at the point (pi/4,6). The equation of this tangent line can be written in the form y=mx+b where m is: and where b is:

asked by kwack on August 21, 2010
90. ## chemistry

write an equation for the formation of a butane.Is this an intramolecular dehydration?Explain.Write an equation for the rection between KMnO4 AND BUTANE

asked by VIVIAN on March 1, 2010
91. ## math

Given the linear equation , find the y-coordinates of the points (-6, ), (-3, ), and (3, ). Please show all of your work. Plot those points and graph the linear equation.

asked by mary on July 17, 2011
92. ## algebra

at the airport the new run way will be parallel to a highway. on the scale drawing of the airport the equation that represents the highway is 6y=8x-11. what is the equation for the runway

asked by sb on April 12, 2012
93. ## intermediate algebra-check my answer

Find the equation of the line. find equation of form y=ax+b, where a is slope, and b is intercept, which passes through points (x1, y1) = (-8, -6) and (x2, y2) = (0, 0) slope 0-(-6)/0-(-8)= 3/4 how would I write it? y=3/4x or y=3/4x+0 ?

asked by Jena on February 15, 2011
94. ## math

Give the equation of a line perpendicular to the line y = -8x + 8 having the y-intercept 2 units below the y-intercept of the given equation. At what point the two equations cross each other?

asked by Jillian on February 28, 2010
95. ## Maths

A circle C passes through the point (-12,9) and is given by the equation (x-a)^2 + (y-b)^2 = r^2. If the equation of the tangent to the given circle at the point (-4,1) is given by x-y+5=0, find the values of a,b and r. The answers have to be a=-8, b=5

asked by Claire on March 17, 2008
96. ## Math

Give the equation of a line perpendicular to the line y = -8x + 8 having the y-intercept 2 units below the y-intercept of the given equation. At what point the two equations cross each other?

asked by Anna on January 9, 2010
97. ## math

I am working on a problem where I am to graph the equation and identify the y intercept the equation is y+x=-9 On the graph, I plotted (0,-9) and (-9,0); I identified the y intercept as (0,-9) Is this correct?

asked by H on January 9, 2010
98. ## math math

Given the linear equation , find the y-coordinates of the points (-6, ), (-3, ), and (3, ). Please show all of your work. Plot those points and graph the linear equation.

asked by mary on July 17, 2011
99. ## Algebra

A system of equations consisting of a liner equation and a quadratic equation (?) has three solutions. always sometimes never*** The solutions given by the quadratic formula are (?) rational always sometimes*** never

asked by Applesauce on April 30, 2018
100. ## math

Given the linear equation y=-3/2x+1, find the y-coordinates of the points (-4), (-2), and (6). Please show all of your work. Plot those points and graph the linear equation.

asked by Allie on December 16, 2010