# Hello, i seem to be stuck on a problem and do'nt know why im not gettin the right answer.I have the he Ka and Kb values for each of the weak acids and bases from the chart and I keep

24,861 results
1. ## math

How do I find the continuity or discontinuity of a graphed function? I am stuck on this problem and cannot whatsoever get past it.

2. ## Chemistry

When 9.0g of Al were treated with an excess of chlorine, 20.0g of Al2Cl6 were collected. 2AL + 3Cl6 -------> Al2Cl6 What was the percentage yield? This is what i did so far # moles in Al = 0.333 # moles in Cl2 = 0.282 The limiting reactant = Cl2 27g of Al

3. ## math

Can someone help me finish this problem I am stuck! 5/4x+1/8x=11/8+x 10/8x+1/8x=11/8+x 11/8x=11/8+x 19/8x=11/8

4. ## English

The problem is my thesis statement. That is the step I am stuck on.

5. ## algebra

i have 2 solve by elimination an i keep gettin fractions when the answer is (-3,-3) my teacher gave me the answer an problem but she wants me 2 work it out idk how i keep gettin fractions the problem is: -3x-4y=21 8x-5y=-9 please help

6. ## Child development

Using these steps, consider a cognitive “problem” a young child might encounter that he/she needs help with (such as putting together a puzzle, sequencing – putting items in order, sorting by color or size, adding, subtracting, tying shoes, learning

7. ## math

what is the awenser/problem to X4=23*6 divide 5%??? im stuck :(

8. ## Math

A bag is filled with 200 silver coins and 123 gold coins. What is the theoretical probability of NOT pulling out a silver coin? I keep gettin this wrong .How can i do this ?

9. ## algebra

I have a formula with order of operations and I am stuck on the division part. Here is the problem: 4+6(12-6) / 16= Can anyone help?

10. ## algebra1

could you walk-through the steps to solving this problem because I am stuck; 3x-5(3x-7)=2(x+9)+45 Let me know if you have a question in any step. 3x-5(3x-7)=2(x+9)+45 3x-15x+35= 2x+18+45 -12x+35 = 2x+63 -35 -35 -12x= 2x +63-35 -12x= 2x +28 -2x -2x -12x-2x

11. ## Physics

Can someone explain to me how I can solve this problem? This problem contains multiple parts but I'm stuck on the last two. Here is the full problem: A block of mass 2.5 kg is sliding at 10 m/s on an initially frictionless, horizontal surface. There is

12. ## ALGEBRA

i AM STUCK TRYING TO FIGURE THIS PROBLEM. SUMMATION NOTATION. 5 OVER A SIDEWAYS Z AT THE BOTTOM THERE IS N=2 AND ON THE SIDE THERE IS (5N+3) I came up with the answer 85

13. ## Chemistry

Hello, i seem to be stuck on a problem and do'nt know why im not gettin the right answer.I have the he Ka and Kb values for each of the weak acids and bases from the chart and I keep getting zero and the second one 2.27*10^-24 is this correct?? Thank uu

14. ## Chemistry

Hello, i seem to be stuck on a problem and do'nt know why im not gettin the right answer.I have the he Ka and Kb values for each of the weak acids and bases from the chart and I keep getting zero and the second one 2.27*10^-24 is this correct?? Thank uu

15. ## Chemistry

Hello, i seem to be stuck on a problem and do'nt know why im not gettin the right answer.I have the he Ka and Kb values for each of the weak acids and bases from the chart and I keep getting zero and the second one 2.27*10^-24 is this correct?? Thank uu

17. ## chem

how many mL of .100 M of acetic acid and .100 M of NaOH, would be need to make the volume 1.0 liters and have a pH7.00 if Ka=1.8x10^-5 please write out the steps or eq for me im gettin stuck

18. ## algebra 117b

I am really stuck if you could me please with this problem y=kxto find yfor x=6 y=-65when x=9 -65=k.9 k=- this is where I get stuck

19. ## math

-3(3x+15)-(10+X)=35 i keep gettin a decimal or a zero am i right?

20. ## Math check 3

f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I have multiplied the LCD of (a-8)(a+7)(a+22)by both sides with no luck. This is a multiple choice question a.)

21. ## Math

I am stuck on a problem that has to do with the double angle formulas. I have to solve this: 4sinxcosx = 1. I tried using the formula 2sinu = 2sinucosu by substituting it in like this: 2(2sinxcosx)= 1 but then I am stuck

22. ## math

this is how i worked it out and i keep gettin a decimal: 4x+(9-3x)=8x-1 4x+9-3x=8x-1 3x 1x-9=8x-1 -1x -9=7x-1 (-9) 7x=8 1.1428571

How can you tell the similarity between displacement and average velocity? It is for a part of a science problem. The lesson did not tell me how to do this. I have been stuck on that problem for a while. I also had my sister help me, and I looked things up

24. ## algebra 2

6y-2(y-4) ________ 3 I keep gettin 4 but my teacher keeps telling me it is wrong. please help me

25. ## Math

Hello! I have been learning about proving identities and can do simple ones but lately I have been really struggling. I am currently stuck on this problem. cos(A-B)/tan(A)+cot(B) = sin(B)/sec(A) I managed to get to: cosAcosB-sinAsinB/(sinA/cosA) +

26. ## math,help

i am stuck with this problem: Problem #12 Solve by using the quadratic formula. 5x^2 + 5x = 3 i am at this step x = (-5 (+/-) sqrt (85))/(10) you are done!

27. ## Math

I need help with this problem: 6/v-1=6/(v-3) I tried working it out like this: >>>6/v-1=6/(v-3) >>>(6-v)/v= 6/(v-3) I cross multiplied to get: >>>3v+18-v^2= 6v >>> -3v+18-v^2=0 ^Here's where I became stuck. I would appreciate it if you would point out

28. ## hoq 2 scare my lil sister?

how can i scare my little sister shes 13 im 15 just feel like gettin her scared she always scares me lol any1 not something 2 kill her but something funny?

29. ## Honors Algebra II

I've been stuck on a problem with my homework for a couple of minutes now. We are doing Systems of Two Equations, using the substitution method. The problem is: 4y-6x+20=0 3=(18/5)x+(21/10)y

30. ## ALGEBRA 2

Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!

31. ## ALGEBRA 2

Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!

32. ## Math

I'm stuck on this 1 math problem. I've tried many ways to figure it out, but I can't. The problem is; 2(3x-5)>2x+6.

33. ## chemistry

I'm confused on number 6 on the take home test. in this problem are we going to use the heat capacity of calorimeter is 2.21kJ/c. I'm confused on how to set this problem up 1)I converted 1.000kg in to grams= 1000g 2) I used q=m*c* the change in T

34. ## Mathmatics

A function of two variables is given by, f(x,y) = e^2x-3y Find the tangent approximation to f(0.989,1.166) near (0,0), giving your answer to 4 decimal places. Any kind soul to help on the problem. My professor raise this problem to me. i am so stuck.

35. ## Algebra

I have about 3 homework problem that I am stuck on! please help me. #1: The area of a rectangle is 16, and its diagonal is \sqrt{68}. Find its dimensions and perimeter. (x^2)+(y^2)=\sqrt{68} (x^2)+(y^2)=8.246 xy=16 y=16/x (x^2)+(16/x)^2=8.246

36. ## physical science

im sorry but im notiing others are gettin help before me with math, algebra, and i honestly think its being done on purpose..just because i keep asking.im justy worried about my test that is coming up..i honestly need help

37. ## pre calculus

Hi, I am having a problem trying to find and understanding how to find the extreme values. I have a problem which I can't do. Will someone please explain for me how to do it. I would like to be able to do other similar problems. This is the problem I am

38. ## pre calculus

Hi, I am having a problem trying to find and understanding how to find the extreme values. I have a problem which I can't do. Will someone please explain for me how to do it. I would like to be able to do other similar problems. This is the problem I am

39. ## Algebra

Stuck on this problem 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 5(-3) + 7(4) = b b = -15 + 28 = 13 m(-3) + 4 = 22 -3m = 22-4 m = 18/-3 = -6 Thank you Sanchi....I will use this as a template

Hi, I'm totally stuck! Problem: sqrt(x-3) = sqrt (2) -sqrt(x) I know I square them to get them out of square roots but after that I'm stuck- answers: -25/8 25/8 no solution 1/8 Please show me how its done Thank you

41. ## algebra 2

Im not sure how to do this problem. cansomeone help. it the only problem im stuck on . . Describe the graph by indicating the vertex, the type of line drawn, broken or solid, and the shading of the graph, above or below : -y+1>-abs(x+3)

42. ## Chemistry

Can someone please help me solve this homework problem for my chemistry class.It's my last problem and I'm stuck!:/ Thanks :) A 4.0*10^1kg sample of water absorbs 308KJ of heat. If the water was initially at 25.5 C, what is its final temperature?

43. ## Chemistry

Hi, I've been working for nearly 2 hrs on this problem, but I'm stuck on the next step. Thanks for any pointers in the right direction. My problem is: How many grams of S8 are needed to produce 225 grams of sulfur hexafluoride? I was given this formula:

44. ## calculus

I have the following problem on a takehome assignment and am stuck. A particular stock has value V(t) at time t where V(t)=Ke^(1/2) where K>0. Assume that alternative investments grow in value to e^(rt). Calculate the instantaneous rate of change in the

45. ## math

Hi I need help with this math problem: The plane that contains the points (8,3,1), (2,6,3), and (4,6,2) has an equation of the form ax + by + cz = d. Find coefficients for this equation, trying two different approaches to the problem. One method uses

46. ## Physics - Gravitational force

Find the gravitational force between earth and the sun. I am using the formula Fg = (G*m1*m2)/(r^2) where G = 6.67*10^-11 m1 = 6.0*10^24kg m2 = 2.0*10^30kg r = should i use the sun's radius or the earths (Rearth = 6.38*10^6; Rsun = 6.96*10^8) either way i

47. ## math

can someone please help me? I am stuck on a problem it deals with inequalities but it is in a word problem which makes it worse for me, how would I solve this problem? Miguel's insurance company will replace his car if repair exceeds 80% of the car's

49. ## math

im stuck on this problem can some one please explain.. y=9(7+4)^2+9

51. ## Physics

A baseball is his so that a travel straight upward after being struck by the bat. A fat observes that it takes three seconds for the ball to reach its maximum height. Find the balls initial velocity and the height it reaches. my professor showed a similar

52. ## Comm155

Need help changing my passive voice words in my academic paragraph... In comparing paragraphs one and two, the flow and comprehension of paragraph two was much better. In paragraph one the author seemed to just be telling the facts instead of explaining

53. ## Math help plz

How thick is a pile of paper? Find a relationship between the number of folds and the number of layers. Note your observations. Number of folds Number of layers 0 1 1 2 2 4 3 8 4 14 5 23 Plz help im so stuck on this question Are you sure 4 14 and 5 23 are

54. ## College Algebra

Hello - I am stuck on this problem and I'm in serious need of some help. I don't understand this question at all. The problem is: Find the equilibrium quantity and equilibrium demand function for the given: Supply: P=45q Demand: P=q^2+10,000

56. ## Math

I am stuck on a problem. Can Somebody tell me what the next number is in the pattern 9,11,15,20,25?

57. ## math

How would you factor this problem? I keep getting stuck. x^2+2xy+2x+y^2+2y-8

58. ## Math

6x-3y = -6 and -5x + 7y = 41 I got stuck on this problem and my answers are outrageous so please help?

59. ## Algebra

Can someone help me factor this problem? Generally I wouldn't have a problem doing it, but today we're supposed to factor problems without knowing what exactly to do, (Trinomial squares, difference of squares, magic diamond, etc), and it's really stumping

60. ## college-- chemistry

I got stuck on this problem and I cannot figure out what to do or explain this problem. Please help me with this problem. The emission lines of one-electron atoms and ions can all be fit to the equation describing the spectrum of the hydrogen atom: E=

61. ## Grandpa need Math help

Gettin to old to help a 13 yr old. I think I know the answer to the below but need to confirm it. Anyone that could assist this ol man would be much appreciated!!! How do the volume of prisms compare as the number of faces in the prisms increases? Does the

62. ## Math

I'm stuck on this problem about percentages, I don't know what to do 8 9/25 as a percentage

63. ## Math

n - is the _________ of a number and 4. 4 Can you please help me with this problem. I am stuck. It has to have 5 letters.

64. ## Chemistry

Dr. Bob get the use PV=nRT just stuck on setting up the problem help!

66. ## Pre Calc

use properties of the trigonometric function to find the exact value of each expression. Do no use a calculator. sec ( - pi/18) * cos (37 pi)/18 I do not see how to do this problem. Every time I do it out I get a reference angle of twenty degrees which

67. ## Pre-algebra

0.2297=(1/x^2-1/49) I don't get how to solve for x. Pls help stuck on a problem

68. ## Math

Ok, I have this problem that I'm really stuck on: This is it: Find each unit rate: 20 mi in 5 h. Please help I need this by tomorrow!

69. ## Math

I'm totally stuck on this problem!! Simplify: (2a^2+13a-7/3a^3-27a)(4a^2-1/9a^2)

70. ## Math

Please what are the steps to solving this problem? I am stuck. question= 12 1/2% x (1/2)/(3/4) 12(1/2)% = 12.5 (1/2) x (4/3) 4/6 = 2/3 I don't know what to do next.

71. ## science

im stuck on this problem fill in the blank To solve the problem of a polluted stream a scientist traced where the pollution came from.She determines=d that the pollution was coming from many small sources.she worked on a plan to help reduce the pollution

72. ## Math

Okay I am stuck on a problem: What do you call the numbers that cannot be arranged into 2-row arrays?

73. ## Pre-Calc

I am stuck solving this problem, any help please..Many thanks find all numbers x that satisfy the given equation ln(2x) ------- =2 ln(3x)

74. ## Math

I need help solving a problem, I am stuck on this one. Write 128 in each one of the following bases a.Five b. Two c. Twelve

75. ## Math(Solve the system)

So I guess I have to: Solve the system using any algebraic method. I'm not sure how so here is the problem I'm stuck on. 9x-5y=-30 x+2y=-3

76. ## Math- ASAP

Could you please help me on this problem, i'm kinda stuck on it and can't find the same base. These are exponents (9^2x-1) = 6^x Thanks for helping me! -ST

77. ## Algebra 1 help, check please?

Okay, so the problem is.. x^2+6=13 Would I just subtract the 6 from the thirteen.. So. x^2=7 Divide by 2? I'm kinda stuck from that point

78. ## Math

Good evening. I have a math problem I need some help with please. 1/2 (3/5 X - 8) + 7/4 (2/5 X + 4) X is a variable. My answer that I have so far is: 3/10 X - 4 + 7/10 X and then I get stuck.

79. ## health information

Paula Patient doesn't want her violent boyfriend to know she's gettin an abortaion, so she asks Dr. Bob to send all communications to her to a post office box and to phone her only at work. What should Dr. Bob do, and what is the legal bases for your

80. ## math

The sides of a right angled triangle are x,x+1 and x+2.find x,Am not gettin the right answer. Being a right triangle, x^2 + (x + 1)^2 = (x + 2)^2. Expanding and simplifying, yields x^2 -- 2x - 3 = 0. Factoring or the quadratic equation will lead you to the

81. ## Math

I am having a problem answering this math problem. Andrea has a box of marbles in it. She has seven red marbles, thirteen blue marbles and nineteen yellow marbles. If she reaches in and takes out marbles without looking, what is the fewest number of

82. ## math

what number is 24% of 95. Sorry but i don't understand how to get numbers using percents. another problem im stuck with is what percent of 90 is 60

I need help bad i been doing this homework since i got home at 4:00 and am stuck on this problem. X -1 : X-2 =sum (x+1)+(x-2)=(x+x+1-2) diff (x+1)-(x-2)=(x-x-1-2) Product (x-1)(x-2)=(x^2-1)

84. ## liberal arts math

Put the equation below in the form ax^2+bx+c=0. -x^2+3=(4x+1)^2, I've been stuck on this for the past hour, could someone please explain how to do this problem?

85. ## Microeconomics

I am stuck trying to illustrate poverty in an Edgeworth box. How do I begin thinking about this problem?

86. ## algebra

I am stuck on a few problems I multipled by the LCM to clear fractions but I keep getting confused can you help me with this problem? 3/4(3+2x)+2>17 and 8x-12

I've been stuck for a while on this problem Which ordered pair represents the solution to the system of equations? { 5x+3y=7 { 3x-5y=-23

88. ## College testing

Im gettin ready to take a placement test for Devry Unviersity. it says Reading , Writing, Arithmetic and Algebra makes up the test. is there any way i can pepare for this test? how long does placement test usually take to complete?

89. ## Quantum Physics

Has anyone done Block 7-8 for TMA 6 for s103 - discovering Science, as i am struggling big time, any help would be much appreciated yes i am like you really phased by this how much of the tma have you managed to do Me, too what r u stuck on? I have been

90. ## Math

I am kinda stuck on this one Simplify: ^5sqrt x^7 y^4 I don't know what to do for this problem. I am lost with what to do with the exponents when you have a number on the outside.

91. ## chemistry

what is the volume, in liter of 2.54 mol methane (ch4) gas? I've been stuck on this problem for hours, someone please help!

92. ## Math

I am kinda stuck on this one Simplify: ^5sqrt(x^7 y^4) I don't know what to do for this problem. I am lost with what to do with the exponents when you have a number on the outside.

93. ## Pre-Algebra

How can I solve this problem, I'm stuck on it: Approximate to the nearest hundreth by interpolation 5*square root of 84.4 Thanks -MC

94. ## Algebra (1)

Hello! I'm currently stuck on a ratio problem and do not understand how to work it. The question is: y+2 over y+7 = ll over 31. Please explain the answer and how to find it.

95. ## Math -Calculus

Hi, I need help with the problem: "Use a definite integral to find the area of the region under the curve y=6-4x^2 and above the x-axis". I keep getting stuck at 6x-(4x^3/3). Thanks!!

96. ## Chemistry

A gas fills 80ml at 740mm. what volume will it have at standard pressure? Stuck on this problem. Please Help. Thanks

97. ## Chemistry

I have tied to solve this problem but am stuck. Hoping what I have done so far is accurate but need help in conversion. What mass, in grams, of oxygen gas (O2) is contained in a 10.5 liter tank at 27.3 degrees Celsius and 1.83 atmospheres? Show all of the

98. ## Chemistry

When titrating 50.0 mL of 0.10 M H2SO4 with 0.10 M NaOH, how many mL of NaOH will you have added to reach the 1st equivalence point? I am confused... What H2A problem? Chemistry-Dr.Bob222 - DrBob222, Tuesday, April 12, 2016 at 1:49am Refer to the H2A

99. ## Integrating Factors

I've been working on this hw problem for a while now, but I'm stuck in the integration process. I'm pretty sure I made an error, cause I can't seem to be able to integrate the right side of the equation. Q: (1/(x^(2)+1))y' + xy = 3 using the equation

100. ## Math

I have a problem..... -4(2x-3)=-8x+5 I understand first you distribute the -4 so you would have -8x+12=-8x+5 Then if you try and move x over to either side you completley get rid of x.... am I missing something or is this problem not solvable? Thank you I