# 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 284
1. ## Chemistry

consider 1.0 L of a solution which is 0.55 M HF and 0.2 M NaF (Ka for HF = 7.2 x 10-4), Calculate the pH of this solution

asked by Chris on November 30, 2012
2. ## chemistry

what is diluted solution and concentrated solution?

asked by berry on July 25, 2017
3. ## Chemistry

How would you prepare 2.15 L of a 8.00 M solution from a 12.0 M stock solution?

asked by wonder on December 2, 2016

One solution of kx^2 +6x-k=0 is -3. Find the other solution I have the answer as -1/3 is this right?

asked by Shawn on November 10, 2008
5. ## Chemistry

The PH of an aqueous solution of NaCN is 10.38. What is [CN-] in this solution?

asked by ChemHurts on August 10, 2009
6. ## Chemistry

you have a solution of 0.1 m KCN and a solution of 0.1 m of HF what is the buffer?

asked by Jennifer on March 16, 2017
7. ## Chemistry

If the pOH of a solution is determined to be 5, what is the pH of the solution?

asked by Tia on April 28, 2011
8. ## algebra

Determine whether -4 is a solution of the inequality x>-4 Is -4 a solution?

asked by Tina on May 20, 2011
9. ## Chem/bio question

HA is an acid that ionizes in 10% in solution. what is the [h+] of a 0.01 m solution of ha?

asked by Karina on September 16, 2015
10. ## Chemistry

If the pH of a Ca(OH)2 solution is measured as 9.0, what is the concentration of the Ca(OH)2 solution? 1 × 10-5 M 1 × 10-9 M 1 × 10-8 M 1 × 10-6 M

asked by Summer on April 11, 2018
11. ## linear systems

This system has one solution. y=8x−14 y=x^2+4x−10 What is the y-coordinate of the solution?

asked by Monika on April 9, 2018
12. ## Math

Is x+3=2y and x=2y-3 have infinitely solutions or one solution or no solution

asked by Math on March 29, 2017
13. ## Science- Calorimetry

Are the "q" solution and the "delta H" solution always equal?

asked by Kathy on August 20, 2018
14. ## chemistry

what is the molarity of a solution containing 15.0 g of NaCl in 1.25 L of solution?

asked by lucky on May 22, 2011
15. ## Math

Does |x^2-3x+3|=3 have a solution? My answer was that there isn't a solution. Am i right?

asked by Unknown. on August 17, 2012
16. ## Chemistry

If 0.45 M of ammonia solution has a pH of 9.20, what is the H+ concentration of the solution?

asked by Anna on January 10, 2015
17. ## Chemistry

I have a .01 M solution of N2, and the concentration of H2 in the same solution is .02. What is the Ksp.

asked by Elizabeth on April 24, 2016
18. ## science

No more solute can dissolve in a solution if it is a--------solution.

asked by gay on January 7, 2009
19. ## math

Help pllsss ASAP!!! have certain answers!! i try but i do not understand! help asap! give answers and walkthrough problems for me! 1. 2(x - 3) = 2x (1 point) one solution no solutions infinitely many solutions 2. 3(y - 3) = 2y - 9 + y (1 point) one

asked by ... on January 2, 2014
20. ## Chemisty

Let's explore the efficiency of chloride ion precipitation in seperating Ag^+ from Pb^2+ in a solution. Suppose that [Pb^2+]= 0.045 mol/L and [Ag^+]= 0.084 mol/L. Calculate the chloride ion concentraion required to just start precipitation of Pb^2+ ion and

asked by Tanner on March 4, 2012
21. ## chem

A student placed 12.5 of glucose (C6H12O6) in a 100ml volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the calibration mark on the neck of the flask was reached. The flask was then shaken

asked by tomi on March 12, 2009
22. ## Chemistry HELP!

A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until

asked by anonymous on February 12, 2009

A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until

asked by anonymous on February 12, 2009
24. ## math - see if correct

If the area is x^2+5x+6m^2 and we know the area is a square which is base times height, we can factor the equation so that it comes out to (x+3)(x+2)since the height is x+3 then we know the base is x+2. (is this correct)

asked by mason on February 23, 2009
25. ## math

Bessy has 6 times as much as Bob, but when each earns \$6, Bessy will have 3 times as much money as Bob. How much does each have before and after earning the \$6? How do you set up the equation?

asked by Linda on June 3, 2013
26. ## maths

write the square root of 32as a power of 2 and hence solve the equation 16to the power of x-1=2 square root of 32

asked by helen on November 3, 2011
27. ## Chemistry

If you have iron(II) oxide(s) + oxygen(g) ---> Iron(III) oxide(s), Would the answer be FeO3 + O2 ---> FeO3 for a skeleton equation?

asked by Daisha on October 22, 2013
28. ## math

asked by jerry piester on August 3, 2015
29. ## math

the normal line to the curve y=f(x)=2x^2 at a point in the first quadrant passes through the point (0,3/4). find an equation of this normal line

asked by jana on March 2, 2016
30. ## Math

For each of the following quadratics, determine if the equation has a max or a min, determine the value of the max or min, the direction of opening and the vertex. y = -2(x + 3)2 – 4 y = 4(x – 3)2 + 7 y = -x2 y = -½(x + 6)2

asked by Ryan on June 24, 2010
31. ## math

Write the slope-intercept equation for the line with slope -2/3 and y-intercept (0, 3) and graph the line. Please show all of your work. (

asked by susan on August 3, 2011
32. ## algebra

Write a slope intercept equation for the line with the slope-1/4 and y-intercept (0,-2)and graph the line.Please show work.

asked by sherry on March 19, 2012
33. ## ^Math.^ Pls,I need help

QUESTION: Find the quadratic equation,which has difference of roots equal to 2 and the difference of the squares of roots equal to 5

asked by Ekingdeft on February 11, 2015
34. ## MATH

Plan A no initial fee and \$75 per month Plan b \$50 per Month for the first 12 months and 125 per month for each additional month after that, what is the equation?

asked by QUEEN on December 8, 2016
35. ## math

I have an equation of P=(170-3x)(x-25) How do I determine the y-intercept I know I can determine the x intercepts by setting x = to zero, so those are easy to find, but I'm not sure how to find the y-intercept. Thank you.

asked by carly on December 3, 2017
36. ## Calculus

Find the slope and the equation of the tangent line to the graph of the function f at the specified point. f(x) = -8/5 x^2 + 7 x + 7;(-1, -8/5) slope tangent line y =

asked by Mike on June 13, 2013
37. ## Is this right?

I have to determine the slope and y- intercept of this equation then graph 4x=6y+9 so I ended up putting it in y-mx+b form and it was 6y=4x+9 so slope is 4x and y intercept is 6y? How would I graph it though?

asked by kelly on October 3, 2012
38. ## albebra

I do not understand how to find x on a graph when there is no equation. I have the possible answers: a) x= -3, b) x=-1, c) x=5, d) x=1 It asks me to find the value of x when y is 5; however, the graph I have has a line (0,2) on the y axis and on the x axis

asked by bart on June 12, 2010
39. ## see if this is correct

If the area is x2 + 5x + 6m2 and we know the area is a square which is base times height, we can factor the equation so that it comes out to (x+3)(x+2) since the height is x+3 then we know the base has to be x+2

asked by mason on February 23, 2009
40. ## Chemistry

C5H12 + O2--- CO2 + H2O give that the equation if I use 85 grams of O2 and excess C5H12 how many grams of CO2 are produced

asked by Jackie on May 19, 2016
41. ## Algebra

Write the slope -intercept equation for the line with the slope-1/4 and y-intercept(0,-2) and graph the line.Show work.

asked by sherry on March 17, 2012
42. ## algebra 2

Marshall has \$1.25 in dimes, d, and nickels, n, in his pocket. Which equation could be solved to find the possible combinations of dimes and nickels Marshall has?

asked by hannah on October 27, 2013
43. ## algebra

The perimeter of a pool is 64 feet and has a width of x and a length of x-4. Write an equation and find both the width and length of the pool.

asked by bob on February 1, 2014
44. ## math

Find the slope and the equation of the tangent line to the graph of the function f at the specified point. f(x)=-10/3x^2+6x+6; (-1, -10/3) slope ?? tangent line y = ?

asked by Kimberly on March 1, 2013

Find the slope and the equation of the tangent line to the graph of the function f at the specified point. f(x)=-10/3x^2+6x+6; (-1, -10/3) slope ?? tangent line y = ?

asked by Kimberly on March 1, 2013
46. ## algebra

james collects 15 rocks. six of the rocks are smooth. the,rest of the rocks.r are rough. which equation can be used to find how many rocks are rough?

asked by stephie on October 15, 2012
47. ## Connections math help

the equation is 3d + 2 equals 29 can be used to find the height of a bean plant days after it was purchased how many days has it been since the plant was purchased A.7.6 B.8 C.9 D.10.3

asked by Jessica on April 26, 2017
48. ## Math

By what percent is a 100-watt light bulb brighter than a 60-watt light bulb? I'm not sure the equation to use to solve this one.

asked by Ann on May 13, 2013
49. ## Calc

The function f is defined by f(x)= (25-x^2)^(1/2) for -5 less than or = x less than or = 5 A) find f'(x) B) write an equation for the tangent to the graph of f at x=3 C) let g be the function defined by g(x)= (f(x) for -5

asked by Aparna on March 19, 2013
50. ## College Math

What is the equation of the line that represents this driver's rate? What is the x axis? What is the y axis? What is the y-intercept? How much is the rate for 5 miles? For 7 miles?

asked by Dee on May 10, 2017
51. ## Clueless in calculus

The function f is defined by f(x)= (25-x^2)^(1/2) for -5 less than or = x less than or = 5 A) find f'(x) B) write an equation for the tangent to the graph of f at x=3 C) let g be the function defined by g(x)= (f(x) for -5

asked by Aparna on March 19, 2013
52. ## Math

a parabola whose rootsare at A(-3,0) and B(6,0) has a y-intercept at point C(0,p),p

asked by Stan on May 29, 2011
53. ## math

a pet store has 8 tanks. each tank has 9 fish in it. write an equation to find how many fish, f, the pet store has in all.

asked by Anonymous on November 24, 2013
54. ## ALGEBRA 1

The square of an integer is 30 more than the integer. Find the integer. Is there some sort of equation to use to solve this? And how can the square of an interger actually be 30 more than the integer? I am confused!

asked by Dippy on March 8, 2009
55. ## Chemistry

During the preparation of K3[Al(C2O4)3].3H2O, NaOH was added slowly and with stirring over an approximately 10-minute period to a solution of Al2(SO4)3 solution. The combined solution was heated to almost boiling and left to stand for a few minutes. 1. Why

asked by Alan on March 22, 2010
56. ## physics

Write the energy transformation equation for each situation Fireworks explodes An arrow is shot off a bow and flies through the air A paved driveway feels hot on a clear ,sunny day A camper raises an axe to chop a chunk of wood A lawn mower with a gasoline

asked by Melissa on April 12, 2012
57. ## physics

Two identical small spherical conductors (point charges), separated by 0.6 m, carry a total charge of 200 mu or micro CC. They repel one another with a force of 120 N. (For the universal constant k use the value 8.99 times 109 N m2/C2.) so I used q1 + q2=

asked by hannah on September 4, 2014
58. ## Math

I need help with these problems for a test. 1. Find the inverse of the one-to-one function. f(x)=5x+1/4. 2. The height of the water, H, in feet, at a boat dock t hours after 7 am is given by E=7+4.4cos pi/35 t, where t is time measured in seconds. Find the

asked by David on June 13, 2010
59. ## Integrated Math 1

Consider y=x^2+8x+16. What is the correct way to factor this equation? How does this equation shift the graph of y=x^2? A. the correct factored form is y=(x+4)^2. this shifts the graph of y=x^2 up 4 units. B. the correct factored form is y=(x+4)^2. this

asked by Tifini on July 15, 2012
60. ## Chemistry

This is a back titration question and I'm struggling with it :/ So if you can help me, that would be very appreciated :) Q. A sample of steel wool was dissolved in excess sulfuric acid. The resulting solution (FeSO4 aq) was then titrated with potassium

asked by Rapunzel on February 27, 2013
61. ## chemistry 101

If 15g of NaOh is dissolved in 285 g of water, calculate the following. Assume the density of the solution is 1.06 g/cc. a) Calculate the moles of NaOH in the solution? My answer is 15gNaOH/40g NaOH= .0375 mole NaOH b) Waht is the mass % w/w of the

asked by Tracy on December 8, 2012
62. ## Mathematics

Let x,y,z be non-negative real numbers satisfying the condition x+y+z=1. The maximum possible value of x^3y^3+y^3z^3+z^3x^3 has the form a/b where a and b are positive, coprime integers. What is the value of a+b?

asked by hope any one can help on May 27, 2013
63. ## heeeeeeeelp math

Let x,y,z be non-negative real numbers satisfying the condition x+y+z=1 . The maximum possible value of x^3*y^3+y^3*z^3+z^3*x^3 has the form a/b where a and b are positive, coprime integers. What is the value of a+b ?

asked by andrew on May 31, 2013
64. ## Geography

what oportunities arise for pastral farming due to the CTWM... please could someone give me any real life cases of this!? thank you

asked by ray on October 23, 2007
65. ## Algebra II

Write a quartic funciton that has 2 real and 2 imaginary roots and rewrite the polynomialin standard form.

asked by Piggy on April 5, 2013
66. ## Maths

Let x,y,z be non-negative real numbers satisfying the condition x+y+z=1. The maximum possible value of x^3y^3+y^3z^3+z^3x^3 has the form ab where a and b are positive, coprime integers. What is the value of a+b?

asked by ABCD on May 29, 2013
67. ## English

I need a good idea for the name of a city for my story about the dust bowl. It is in 1930 and in Kansas (the name doesn't have to be real)

asked by GGDarkNebula on November 13, 2018
68. ## analytic geometry helps are appreciated

For some positive real number r , the line x+y=r is tangent to the circle x^2+y^2 = r. Find r. How do we do this? Set equal equations together??

asked by Knights on March 1, 2013
69. ## Algebra 2

Simplify sqrt(72x^3)-5xsqrt(2x). Assume that each radical represents a real number. I need all of the steps. Thanks

asked by Brandon on May 26, 2011
70. ## college Ecology

1. How can we determine the maximum sustained yield of a vertebrate population? I need details and preferable real examples!!

asked by Jen on December 12, 2008
71. ## Maths

If X and Y are real numbers Determine the minimum value of 2x^2+2xy+2y^2+6y how do i separate the two to get two simultaneous equations?do i use the inequality sign > ?

asked by Hlogi on February 8, 2016
72. ## College Algebra

Find a Quadratic polynomial function with real coefficients satisfying the given conditions. -4 and 3 are zeros; f(1) = -30 HELP. I have no idea.

asked by Billy on November 25, 2013
73. ## pllllls heeeeeeeeelp math

Let x,y,z be non-negative real numbers satisfying the condition x+y+z=1 . The maximum possible value of x^3*y^3+y^3*z^3+z^3*x^3 has the form a/b where a and b are positive, coprime integers. What is the value of a+b ?

asked by andrew on May 30, 2013
74. ## spanish play Fuente Ovejuna

Hello, for act one I can't find the answer to how does the battle at Ciudad Real end? Would it be how Fernan Gomez destroyed it. thanks

asked by bodes on September 9, 2008
75. ## Math

Create a 3rd degree polynomial with real coefficients that has roots -1 and 4i. Write your answer in form ax^3 + bx^2 + cx+ d .

asked by Anon on May 24, 2013
76. ## algebra

Write a compound inequality that represents the following phrase. Graph the solutions. all real numbers that are between negative 7 and 4

asked by cole on March 6, 2018
77. ## Math

Create a 3rd degree polynomial with real coefficients that has roots -1 and 4i. Write your answer in form ax^3 + bx^2 + cx+ .

asked by Anon on May 24, 2013
78. ## math

x,y,z are positive real numbers such that x+y+z=9 and xy+9xz+25yz=9xyz. Find the sum of all possible values of xyz.

asked by Anonymous on April 29, 2013
79. ## colag

use the rational zero theorem and descartes’ rule of signs to assist you in finding all real and imaginary roots for x^4+2^3-3x^2-4x+4=0

asked by Anonymous on April 3, 2013
80. ## math-163

for the polynomial, list each real zero and its multiplicity. determine whether the graph crosses or touches the x-axis at each x-intercept. f(x)=1/2x^4(x^2-5)(x+1)

asked by albert on March 1, 2011
81. ## english literature

If I was going to compare Achilles from The Iliad and Pierre from War and Peace to two real people, who do you think would represent them the best? Thanks, Michelle

asked by Michelle on July 11, 2010
82. ## geography

bp oil spill - how long did it take to clear it up?, and can i have a real life story about it x oh and some history facts and figures please x thank you so so much x

asked by anonymous on November 17, 2010
83. ## algebra

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6

asked by ashley on April 9, 2012

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6

asked by ashley on April 9, 2012
85. ## algebra

systems of nonlinear equations i need to help i have tried this problem but i cannot find the right answer i need to determine the real solutions for this: x^2+4xy=10 4x^2-xy=6

asked by ashley on April 9, 2012
86. ## history

what does the author of "the real story of jamestown" argue is the most tremendous change in the world next to the extinction of the dinosaurs?

asked by Maria on February 17, 2011
87. ## personal finance

The real estate agent tells the bergholts that they don't care to purchase they night consider renting

asked by loraina on July 30, 2008
88. ## bio

what is the formula for the optimal sex ratio in a hamiltonian population? What are some real organisms that show this adaptation?

asked by Anonymous on November 11, 2010
89. ## Algebra 1

Brandon scored 95,87,99, 95 and 89 on his last five qizzes . What subset(s) of the real number systen do these scores belong to as a set?

asked by Jynessa on January 18, 2014
90. ## Algebra

Someone please help me I have g(x)=7/5-5x It says to find the domain I am unsure how to write it out as it is all real numbers I wrote it like this is it correct? {x|x>4/5} The > sign has a underline under it*****

asked by Anonymous on July 9, 2008

What is the value of analyzing foreign trade data? For example, what should the quadrupling in real terms of exports in just 30 years indicate to businesspeople?

asked by Luo on September 18, 2012
92. ## Pre-Calculus/Trigonometry

Help Me, Please Here is a table of values for y = f(x). x: 0, 5, 10, 15, 20, 25, 30, 35, 40 f(x): 5, 6, 7,8, 9, 10, 11, 12, 13 Mark the statements that are true. A. f(5) = 6 B. The domain for f(x) is the set {5, 6, 7, 8, 10, 11, 12, 13}. C. The range for

asked by Anonymous on September 9, 2014
93. ## Math

Given the axioms: ln x = definite integral from 1 to x of 1/t dt ln e = 1 Given the theorems: ln a^r = r * ln a (for all real numbers r) ln e^x = x * ln e = x Prove that e^(ln x) = x Intuitively, I can see that is true, but how can it be proved?

asked by Sean on March 12, 2009
94. ## math

-3.5,-3,-v3,1,0,2/9,v5,15.3,18 my teacher said to write which ones are natural, rational, whole, integers, irrational, & real which i understand but i don't know what she means by -v3 & v5?

asked by Anonymous on October 19, 2013
95. ## algebra

Simplify expression. Assume all variables represent nonzero real numbers. ( (3y^2)/2)^3 I started to reduce but it did not look right.

asked by Maria on July 26, 2009
96. ## Game Design

Real-time strategy games, as a gene, often emphasize spatial immersion True **** False

asked by Mal on January 17, 2018
97. ## Pre-cal

let P(x)=2x^4-x^3+13^2-8x-24. Use synethetic division to show that x+1 is a factor of P(x) Answer:2x^3-3x^2+16x-24 Then find all real and imaginary roots of P(x)=0.

asked by Jill on January 9, 2010
98. ## Math - Functions

For the real valued functions f(x) - |x| - 4 and g(x) = sqrt(5 - x) Find the composition of f o g and the domain in interval notation. Can someone help me solve this?

asked by UnstoppableMuffin on May 2, 2007
99. ## algebra 2

write a polynomial function of least degree that has real coefficeints the given zeros and a leading coefficient of 1. the problem is 5,2i,-2i

asked by jay on October 14, 2011
100. ## central

quadratic equations by graphing The idea is to graph the function f(x)=ax^2 + bx + c, and where it crosses the x axis (y=0) are the real roots.

asked by teyonna on April 10, 2007