Wednesday
August 20, 2014

Posts by Kiki


Total # Posts: 384

algrbra/trigonometry
this is wrong.
May 18, 2010

math
A polyhedron has 15 vertices and 31 edges. How many faces does it have?
May 10, 2010

math-PLEASE HELP
Answer the following questions to determine why Euler’s formula continues to hold for the polyhedron formed by cutting corners off of an octahedron, : a. For an octahedron V = , ____,F = ____, and E = _____. b. When you slice off one corner of the octahedron, you (gain or...
May 2, 2010

apchemistry
thank you for your help before---also, what can i react with BaO to get some noticable consequence---how can i show that what MgO was involved in the reaction?
April 29, 2010

APChemistry
Thank you for your help! I just had a question.. is BaO barium oxide a precipitate? or if I combine MgO with Ba(NO3), will I get BaO and is this a solid?
April 29, 2010

APCHemistry
Hi these are the posts from earlier---i just had a quetsion about your response: ""Apchemistry - DrBob222, Monday, April 26, 2010 at 7:10pm Your thinking is ok. All ionic solids, although composed of ions, are locked into place by the crystal lattice structure of the...
April 26, 2010

Apchemistry
ohh so conductivity has more to do with ions that carry charge, rather than electrons carrying charge???
April 26, 2010

Apchemistry
Thank you for your help Why is solid copper (I) nitrate a poor conductor? I know that CuNO3 is an ionic solid, so maybe (please check me on this) the electrons in CuNO3 are exchanged in the formation of electrostatic attractions found within ionic solids, so the electrons ...
April 26, 2010

math-please help!
The number of complaints received by a business bureau can be represented by the following probability distribution. Find the expected number of complaints per day. complaints per day -0,1,2,3,4,5 probability-0.01,0.11,0.26,0.28,0.19,0.12 can someone please help me figure out ...
April 25, 2010

math-help
what is the formula to find the distance of a cube with three sides that are measured at 6 each.....
April 25, 2010

math-please help!
Use the properties of lines to parallel solve the problem. If p ðF q and mÚ8 = 52‹, what are the measures of the other angles?
April 25, 2010

math-please help!
Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?
April 25, 2010

math
Determine whether the situation calls for a discrete or continuous random variable. The number of freshmen in the required course, English 101 The braking time of a car I think the first one discrete and the second is continous is this correct?
April 25, 2010

math-please help
If a two-card hand is dealt from a well-shuffled deck of 52 cards, what is the probability that the hand contains two kings?
April 25, 2010

math
When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting a red 10 or a black 6. I think the answer is 1:12. Is that correct?
April 25, 2010

apchemistry
thank you but i do not see the post you posted to my answer...
April 19, 2010

apchemistry
How do you seprate a homogenous mixtre of 2 volatile liquids?
April 19, 2010

apchem PLease Answer
What is the equation for HOCl dissolves in HOH? I don't get it...
April 19, 2010

APChemistry
So if I can't assume that, then how can I calclate pH? I dont know K value, so I can't use Henderson Hasselbalc...
April 18, 2010

APChemistry
If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you
April 18, 2010

APChemistry
If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you
April 18, 2010

APChemistry
So if I can't assume that, then how can I calclate pH? I dont know K value, so I can't use Henderson Hasselbalc...
April 18, 2010

APChemistry
If you have CL2 + H2o ---> H+ + Cl- + HOCl and you are given [HOCl] = 0.06 M and you have to find pH.... can you assume that [HOCl] =[H+] = 0.06 M since H+ and HOCl both have a coefficient of 1? Thank you
April 18, 2010

APChemistry
Hi If I had 40 mL of 0.1 M HOBr and mixed that with 10 mL of 0.5 M Ca(OH)2 how would I go about calclating the pH? (i don't know if titration is right because equivalence, halfway pts, etc.. are not specified).. Thank you very much.
April 18, 2010

APChemistry
wait, if you have "NaOBr(s) + H2O ==> NaOH + HBr and the net ionic equation is OBr^- + HOH ==> HOBr + OH^- " why doesn't this: NaOBr(s) + H2O ==> NaOH + HBr become this: Na+ + OBr- + H2O ==> Na+ + OH- + H+ + Br- which would become OBr- + H2O ==> OH...
April 18, 2010

APChemistry
thank you
April 18, 2010

APChemistry
Hi What is the netionicequation for NaOBr disolving in watr? Thanks!
April 18, 2010

math-DUE TONIGHT PLEASE HELP
can you help me get started please? I dont know where to begin
April 12, 2010

math-DUE TONIGHT PLEASE HELP
A shoe store carries one brand of shoe in 3 styles, 5 sizes, and 4 colors. How many different shoes are available for this one brand?
April 12, 2010

math
Consider the experiment of rolling a single die. Find the probability of the event described. What is the probability of rolling a number less than or equal to 4?
April 12, 2010

math-DUE TONIGHT PLEASE HELP
The mean height of 5 students is 61.8. If one of the students leaves, the mean height becomes 60. What is the height of the absent student?
April 12, 2010

math
Attendance records at a school show the number of days each student was absent during the year. The days absent for each student were as follows: 8 2 4 3 2 7 6 0 9 3 3 4 2 4 6 Create a dot plot for this data
April 11, 2010

math-please help due tonight
If P (A) = 2/3, P (B) = 1/6, and P (A and B) = 0 what can you say about P (A or B)?
April 7, 2010

math-PLEASE HELP
consider a bowl containing 36 different slipsof paper. Ten of the slips of paper each contain one of the set of digits0 through 9 and 26 slips each contain one of the 26 letters of the alphabet. Determine the probabilities of the events specified. Drawing one slip, what is P (...
April 7, 2010

math157-PLEASE HELP
When the median and mean are substantially different, what does that tell you about the data?
March 30, 2010

apchemistry
Hi Please double check me: I had to state whether the process forms a voltaic or eletrolytic cell: YOu plug in your MP3 player to charge the nickel-cadmium battery (I said electrolytic)??? The radio plays in your car even though the engine is not running. (I said voltaic???) ...
March 30, 2010

apcehmistry
A thin metal sheet is composed of Fe and Co How do you ionize Fe to Fe2+ but not ionize Co ? I tiried using the activity series of metals, but Fe is above Co, so anything that would ionize Fe would also ionize Co right? So what JUST ionizes Fe but not Co? Thaak you
March 30, 2010

apchemistry
thank you--also, does this work for the Fe iron part of the question too?
March 29, 2010

apchemistry
a thin metal sheet is compposed of Fe and Cobalt You would like to recover the Cobalt What oxidizing agent(s) would allow you to ionize Fe to Fe2+ but not ionize Co?
March 29, 2010

apchemistry
PartA Suppose you had a solution containing Pb2+ and Tl+ and wanted to convert the lead to solid metal but leave the Tl+ in solutin. What reducing agent(s) would be able to drive the reaction?
March 29, 2010

apchemistry
I tried to figure this out with my standard reduction potentials sheet, and tried to find a sulfate ion for the first part, but I don't think that is the answer...any help is much appreciated
March 29, 2010

math
Grade Frequency A 2 B 8 C 11 D 2 F 1 how would this graph change if there were twice as many grades?
March 29, 2010

math
The following data set gives the difference between the winning and losing scores in 50 randomly observed highschool basketball games: 2, 12, 1, 2, 12, 5, 14, 2, 45, 9, 1, 8, 18, 28, 9, 4, 30, 16,4, 12, 8, 13, 20, 9, 17, 13, 49, 17, 13, 4, 14, 2, 12, 29, 8,9, 11, 4, 6, 22, 4, ...
March 29, 2010

Math- CAN SOMEONE PLEASE CHECK MY WORK?
7x+5y=-26 x=28-6y solve using substitution okay so then 196-42y+5y=-26 then combined like terms so 196+37y=-26 37y=-222 y=-6 is this part correct?
March 28, 2010

math-word problem- PLEASE CHECK MY ANSWER
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time will train B catch ...
March 28, 2010

math- system
x+5y=4 x=7-5y give the ordered pair
March 28, 2010

math-word problem-please help
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time will train B catch ...
March 28, 2010

math-slope
f(x)=-2x-3 Find the slope and the y intercept
March 28, 2010

math-graphing
y>-5 x>6 How would I get ordered pairs to graph this?
March 28, 2010

math-graphing
How would I graph the equation y=6?
March 28, 2010

math
x+2y=4 Find the ordered pairs would this be (0,2) and (4,0)?
March 28, 2010

math-please help due tonight
find the two ordered pairs from this equation. y+x=-2 then give the ordered pair of the y intercept?
March 28, 2010

math- CAN SOMEONE PLEASE HELP
find the two ordered pairs of this equation. y=5/3x+8 then give the slope and y intercept. I know the slope is rise over run and is the y intercept 8? This is the answer I got but I am still really confused how do I get my two ordered pairs this makes no sense to me! Your Y-...
March 28, 2010

math
Find the two ordered pairs using this equation- x+3y=6
March 28, 2010

math substitution method
okay so then 196-42y+5y=-26 then combined like terms so 196+37y=-26 37y=-222 y=-6 is this part correct?
March 28, 2010

math substitution method
use the substitution method to solve 7x+5y=-26 x=28-6y
March 28, 2010

math- like terms
collect like terms 10c+5d-5c-8d= 5c+3d? is this correct?
March 28, 2010

math
find the two ordered pairs from this equation. y+x=-2 then give the ordered pair of the y intercept?
March 28, 2010

math-word problem
Amy paid $53.74 for a pair of running shoesduring a 15% off sale. what was the regular price?
March 28, 2010

math-word problem
Train A and B are traveling in the same direction on parallel tracks. Train A is traveling at 100 miles per hour and train B is traveling at 120 miles per hour. Train A passes a station at 5:20am. If train B passes the same station at 5:35 am, at what time will train B catch ...
March 28, 2010

math-slope and y intercept
find the two ordered pairs of this equation. y=5/3x+8 then give the slope and y intercept. I know the slope is rise over run and is the y intercept 8?
March 28, 2010

math
Thanks Reiny
March 28, 2010

math
6x-4y=20 and 4y-6x=-20 What is the solution of the system of equations for this problem? A)A point B)No solution C)Infinitely many solutions These points would have C correct?
March 28, 2010

math- CAN SOMEONE PLEASE CHECK MY WORK
In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data E(t)=____t+____ uses this to ...
March 28, 2010

math-slope
would the slope of (0,3) and (-6,-3) be -6/-6?
March 28, 2010

math
Can someone help me find the two order pairs of this problem.. 5x+6y<30 I have to graph but I am unsure how to find the ordered pairs
March 28, 2010

math
5x+2y=8 2x+5y=1 is this parallel, perpendicular or niether?
March 27, 2010

math
I know that is why the question confuses me so the answer is c/9=d?
March 27, 2010

math
but you dont have C so how do you solve for D?
March 27, 2010

math
Solve for the indicated letter c=9d, for d I am not sure I understand this question can someone help
March 27, 2010

Math
Solve 9(w-2)=-18 9w-18=-18 9w=0 w=0 Is this correct?
March 27, 2010

math-multiplying
3/1 * (6/5) = 3 and 3/5 is this the correct answer?
March 27, 2010

math
6x-4y=20 and 4y-6x=-20 What is the solution of the system of equations for this problem? A)A point B)No solution C)Infinitely many solutions
March 27, 2010

math-word problem
Media Services charge $20 for a phone and $30/month for its economy plan. The equation C=30t +20 describes the total cost, C of operating a media service phone for t months. The total cost for 10 months of service is... My answer is $320 for 10 months service...is this correct...
March 27, 2010

Math
Can someone help me solve 0.7x+7<1.5x-8
March 27, 2010

Math
Thank you for your help!
March 27, 2010

Math
from here would you combined 4x-10x=-6x then it would show x=5+-6x and then you would go +6 to both sides to get 6x=5 and then divide to get your answer would this be correct?
March 27, 2010

Math
Solve 5/2X + 1/4X = 5/4 +X
March 27, 2010

math
solve the compound inequality 4>-2x+3 or 12<-2x+5
March 27, 2010

math
50% of what number is 35 would the answer be .50N=35?
March 27, 2010

math-word problem
In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data E(t)=____t+____ uses this to ...
March 27, 2010

math-elimination
I am still very confused on how to find the ordered pairs and I guess I do not understand what you are saying.
March 27, 2010

math-elimination
solve using the elimination method but I do not know where to begin
March 27, 2010

math-elimination
3x+4y=5 6x+8y=10
March 27, 2010

math--simplify
Simplify -9[-15-(45-12)]=
March 27, 2010

math-word problem
To find the slope would it then be 75.7-73.5/73.5 so the slope would be 33.4?
March 27, 2010

math-word problem
In 1992, the life expectancy of males in a certain country was 73.5 years. In 1996, it was 75.7 years. Let E representthe life expectancy in yeart and let t represent number of years since 1992. Fill in the linear function E(t) that fits the data E(t)=____t+____ uses this to ...
March 27, 2010

math
The equation y = -1777x+27153 can be used to predict the number y of gun deaths in the United States x years after 20000, that is, x=0 corresponds to 2000, x=3 corresponds to 2003, x=5 corrresponds to 2005 and so on. Predict the number of gun deaths in 2005 and 2007. In what ...
March 27, 2010

math
Finding the domain of G(X)=4/4-3X So would the domain be 3 then?
March 26, 2010

math
The function H descibed by H(X)=2.75X+71.48 can be used to predict the height, in centimeters, of a woman whose humerus (the bone from the elbow to the shoulder) is x cm long. Predict the height of a woman whose humerus is 39 cm long. I have an answer of the height is 178.73 ...
March 25, 2010

math -word problem
The width of a recangle is fixed at 13cm. What Length will make the perimeter greater than 78cm?
March 25, 2010

Math
So is that what the net yardage would be gains?
March 25, 2010

Math
On three consecutive passes a football team gains 7 yards, loses 34 yards and gains 24 yards. What number represents the total net yardage? For this would I just add 7+34+24 or is there a formula I should use?
March 25, 2010

math
Finding the domain of G(X)=4/4-3X Unsure where to begin here
March 25, 2010

Math 116
Find the slope =, if it exists, of the line containing the pair of points (7,10) and (9,-1)
March 25, 2010

math
x=8 correct?
March 24, 2010

math
Please help me solve. 8x-(2x+5)=43
March 24, 2010

Math
Translate to an algebraic expression The product of 46% and some number. use D for some number and change the percentage to a decimal. Here is what I think it is .46D is that correct?
March 24, 2010

math
-8<3x-5<-4 unsure how to solve can someone please give me the steps?
March 23, 2010

math
Evaluate r+s/8 for r=20 and s = 20 20+20/8 40/8 answer is 5 is this correct?
March 23, 2010

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