# Posts by Kiki

Total # Posts: 574

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?

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?

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?

apchemistry
thank you but i do not see the post you posted to my answer...

apchemistry
How do you seprate a homogenous mixtre of 2 volatile liquids?

What is the equation for HOCl dissolves in HOH? I don't get it...

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

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

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

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

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

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.

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...

APChemistry
thank you

APChemistry
Hi What is the netionicequation for NaOBr disolving in watr? Thanks!

can you help me get started please? I don't know where to begin

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?

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?

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?

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

If P (A) = 2/3, P (B) = 1/6, and P (A and B) = 0 what can you say about P (A or B)?

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 (...

When the median and mean are substantially different, what does that tell you about the data?

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???) ...

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

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

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?

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?

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

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?

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, ...

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?

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 ...

math- system
x+5y=4 x=7-5y give the ordered pair

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 ...

math-slope
f(x)=-2x-3 Find the slope and the y intercept

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

math-graphing
How would I graph the equation y=6?

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

find the two ordered pairs from this equation. y+x=-2 then give the ordered pair of the 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? 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-...

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

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?

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

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

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

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

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 ...

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?

math
Thanks Reiny

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?

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 ...

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

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

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

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

math
but you don't have C so how do you solve for D?

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

Math
Solve 9(w-2)=-18 9w-18=-18 9w=0 w=0 Is this correct?

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

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

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...

Math
Can someone help me solve 0.7x+7<1.5x-8

Math
Thank you for your help!

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?

Math
Solve 5/2X + 1/4X = 5/4 +X

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

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

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 ...

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.

math-elimination
solve using the elimination method but I do not know where to begin

math-elimination
3x+4y=5 6x+8y=10

math--simplify
Simplify -9[-15-(45-12)]=

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

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 ...

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 ...

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

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 ...

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

Math
So is that what the net yardage would be gains?

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?

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

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

math
x=8 correct?

math

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?

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

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

math
thanks

math
Find the slope of x=-6 unsure where to start here can someone please help?

Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that there are two floor plans still available, and that there are a total of 70 houses available. Use x ...

Math 116
Okay so now I am working on the substitiution portion of this assignment and I understand the first part by not the second can someone help? Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) ...

Math 116
heres what I think the answer is please tell me if I am correct A)x+y=30 B)I get stuck at costs for homes and elimination method

Math 116
As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a) The sales representative here tells you they also have two floor plans available, but they only have 30 homes available. ...

APChem
Hi I tried to understand this but I don't know why the answer is B: Which one of the following pairs cannot be mixed together to form a buffer solution: A) NaC2H3O2, HCl B)RbOH, HBr C) NH3, NH4Cl D) H3PO4, KH2PO4 E) KOH, HF The answer is B but could you explain why? I know...

APChem
Hi! Thank you for your help... A 25.0 mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. The H3O+ concentration after the addition of 66.2 mL of KOH is ______M. (The answer is supposed to be 1.00X10^-7) How do I set this problem up? I realize that it is a ...

ap chemistry
can you help: "Explain why there are no geometric isomers of tetrahedral complexes. thank you

APChem
"The osmotic pressure of a saturated solution of strontium sulfate at 25C is 21 torr. What is the solubility product of this salt at 25C (Hint: calculate molarity from the colligative properties eqn of osmotic pressure and use it in the equilibrium expression" I ...

APCHEm urgent!!!!!!
Hi thank you so much!!!! What is a net ionic equation for the reaction of H+ with Cu(NH3)4 ^2+ ALSO what is the net ionic equation for the reaction of H+ with Hg2Cl2 Does the H+ addition increase, decrease, or has no impact on the solubility of the salt.?

APChem
If an air bubble passes unnoticed through the tip of a buret during a titration (where a weak nonvolatile acid HA is the analyte) , the calculated molar mass of HA would be too high, too low, or not affected? I thought it would be too high, since an air bubble in the buret ...

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