Friday
August 29, 2014

Posts by PsyDAG


Total # Posts: 18,021

math word problems
It lost the 2' plus another 4' (1 yd 1 ft). 2' + 4' =?
March 23, 2014

statistics
You do not mention what is being measured. Do the numbers represent SAT Scores or the number of people who took the test (participation rates)? Points on a scatter diagram are each represented by two numbers, one on the ordinate (Y axis) and the other on the abscissa (X axis...
March 22, 2014

algebra (?)
No wall shown. you cannot copy and paste here.
March 21, 2014

Probability (?)
We do not have access to Table III.
March 21, 2014

Algebra
Multiply both sides by z. 6 - 3z = 8/5z Add 3z to both sides. 6 = 3z + 8/5z = 23/5z Multiply both sides by 5/23. 6 (5/23) = z 30/23 = z
March 21, 2014

Statistics
Find the means first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. Standard deviation = square root of variance Z = (mean1 - mean2)/...
March 21, 2014

math
a. What are pairs of factors of 128? Start with 2, 64. b. Pick the two factors that would allow the needed space. c. L * W = Area W = Area/L
March 20, 2014

math (?)
What design? Cannot copy and paste here.
March 20, 2014

algebra
Ratio is 1:3 with total of 4. 1/4
March 20, 2014

statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.071) and its Z score. OR… http://davidmlane.com/hyperstat/z_table.html
March 19, 2014

math
6 * .25 = ?
March 19, 2014

math
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though. However, I will do one problem. 4. 10b + 25 = 5(2b + 5)
March 19, 2014

Chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 19, 2014

statistic****help*****
There are 2 possibilities with each coin. TTT HTT THT TTH HHT HTH THH HHH How many is that?
March 19, 2014

math
From your data, it makes more sense to subtract. Multiply second equation by 5 and subtract it from the first. 5x + 20y = 40 5x + 15y = 30 5y = 10 You should be able to proceed from here.
March 19, 2014

English??
"How to subtract from ADD"?
March 19, 2014

Health
Since this is not my area of expertise, I searched Google under the key words "mastication muscles" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=mastication+muscles&ie=UTF-8&oe=UTF-8 In the future, you can find the information ...
March 19, 2014

psychology
I can't make any sense out of it either. It would help if you proofread your questions before you posted them. You cannot copy and paste here.
March 19, 2014

psychology
mental processes
March 19, 2014

statistic****help*****
Looks fine to me.
March 19, 2014

statistic****help*****
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though. However, I will start you out. 10. Since you are dealing with percents, the grand total = 1....
March 19, 2014

Statistics
95% = mean ± 1.96 SEm SEm = SD/√n I'll let you do the calculations.
March 19, 2014

science question
indicator? Independent variable? determiner?
March 18, 2014

STATISTIC***HELP
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.
March 18, 2014

Alegbra
If you move the decimal place to the left, the exponent is positive. If you move decimal place to the right, exponent is negative. 9.3 * 10^7
March 18, 2014

Algebra
3.4 * 10^-7
March 18, 2014

Science
As long as you are saying "any," I would choose 1.
March 18, 2014

Statistic
K = .40 * .40 = ? L = .30 *.60 = ? Either-or probabilities are found by adding the individual probabilities.
March 18, 2014

Math 3
130/8 = 16.25 If she wants to bag "all" the cookies, there will be only 2 in the 17th bag.
March 18, 2014

math
Well, what do you notice? Is it closer to the original number?
March 17, 2014

Astronomy
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. Since this is not my area of expertise, I searched Google under the key words "fastest moon" to get these possible sources: https...
March 17, 2014

Stats
80% = mean ± 1.28 SD
March 16, 2014

statistic help please
See Post under name of Helen.
March 16, 2014

statistic help please
32/259 = ? I have already answered this second question in a previous post.
March 16, 2014

statistic
I'm not sure about D.
March 16, 2014

statistic
A. 26/52 = ? B. How many queens are there? Divide by 52. C. How many red queens are there? Divide by 52. D. If the face card was replaced, no different from B. If not replaced, and queen drawn, 3/51. Or if queen not drawn, 4/51. Either-or probabilities are found by adding the ...
March 16, 2014

Biology
B https://www.google.com/search?client=safari&rls=en&q=water+to+steam&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
March 16, 2014

Biology
Since this is not my area of expertise, I searched Google under the key words "mutation DNA" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=mutation+DNA&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire more...
March 16, 2014

Science
Different from what? Each different substance has distinct chemical and physical properties.
March 16, 2014

science (?)
Which wave? https://www.google.com/search?client=safari&rls=en&q=calculate+amplitude+of+a+wave&ie=UTF-8&oe=UTF-8
March 16, 2014

Science
Agree with Jay.
March 16, 2014

Math (Partial)
First two questions and last. Z = (score-mean)/SD SD^2 = variance Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability of the Z score.
March 16, 2014

Statistics (?)
No data given. Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = √(SEmean1^2 + SEmean2^2) SEm = SD/√n If only one SD is provided, you can use just that to determine SEdiff. Find table in the back of your statistics text labeled something ...
March 16, 2014

statistics
95% = mean ± 1.96 SEm SEm = SD/√n
March 16, 2014

Science
Rain forest is only one type of environment and trees are only one group of plants. Organisms either adapt to their environment or die.
March 15, 2014

math
Volume cone = 1/3π(r^2)h Surface area Square pyramid = 2bs+b^2 Volume Rectangular prism = L*b*m
March 15, 2014

stat
I don't know what your "rule of thumb" is, but: a. 95% = mean ± 1.96 SD b. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to ...
March 15, 2014

Phi
Since this is not my area of expertise, I searched Google under the key words "social contract approach to political theory" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=social+contract+approach+to+political+theory&ie=UTF-8&oe=...
March 14, 2014

human bio please help
A fibers B Calcium?
March 14, 2014

science (?)
What phenotypes?
March 14, 2014

science
http://simple.wikipedia.org/wiki/Malleability In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
March 13, 2014

math
Looks good!
March 13, 2014

math
Right!
March 13, 2014

Weather needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 13, 2014

Science
These apply to any subject. http://drdavespsychologypage.homestead.com/Be_Here_Now_.pdf http://drdavespsychologypage.homestead.com/Learning_Requirements.pdf http://drdavespsychologypage.homestead.com/Learning_Hints.pdf
March 13, 2014

Biology
Right
March 12, 2014

Science... plz help~!(?)
https://www.google.com/search?client=safari&rls=en&q=popul+Vuh&ie=UTF-8&oe=UTF-8#q=popol+vuh+mayan&rls=en
March 12, 2014

Algebra
(x+y)^2 = x^2 + 2xy + y^2
March 12, 2014

Alegbra
Online "^" is used to indicate and exponent, e.g., x^2 = x squared. When multiplying terms, the exponents are added. (x^5)(x^7) = x^12
March 12, 2014

SCIENCE HELP ASAP PLZ! ONLY ONE QUESTION!!!!!!!!
Since when do social groups provide instincts?
March 12, 2014

SCIENCE HELP ASAP PLZ!
If you have no territory, you have no resources.
March 12, 2014

Science
Since this is not my area of expertise, I searched Google under the key words "respiration of animals" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=respiration+of+animals&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
March 11, 2014

math
Find 2 factors in your end terms that will add to give the middle term. 18 = 9*2 = 6*3 This doesn't seem possible with your equation. Do you have a typo?
March 11, 2014

Chem needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 11, 2014

human biology please help
Since this is not my area of expertise, I searched Google under the key words "golgi bodies function" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=golgi+bodies+function&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
March 11, 2014

algebra
Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. I'll let you do the calculations.
March 11, 2014

Liberal Arts Math II
https://www.google.com/search?client=safari&rls=en&q=snowflake+island+perimeter&ie=UTF-8&oe=UTF-8
March 11, 2014

biology PLEASE HELP
Cell membrane
March 11, 2014

human biology need help
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.
March 11, 2014

Physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 11, 2014

Math
I would use a bar graph for both.
March 11, 2014

Math
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. See your later post.
March 11, 2014

Math - please help
L = 3s k = s -20 s + 3s + s-20 = 170 Solve for s, then k and L.
March 11, 2014

Algebra
Right!
March 11, 2014

Algebra
1, 2. Okay 3. √0 - 2 = -2… √9 - 2 = 3 - 2 = 1 I'll let you do the other two.
March 11, 2014

math
.06% = .0006
March 11, 2014

Please Help Me :( Science: Biology, Genetics!
1. alleles? 2. mitosis, meiosis 3. incomplete dominance? 4. chromosomes 5. reproduce?
March 10, 2014

6th grade math - statistics
The middle 50% would be from between 3 and 4 to between 8 and 10 (the middle 6 scores). Q1 defines the lowest 25% (0, 1, 3), while Q3 defines the highest 25% (10, 12, 12).
March 10, 2014

exam # 013050 (?)
No data given.
March 10, 2014

Alegbra
x = 5000-y .05x + .08y = 331 Substitute 5000-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation. Where can I find those interest rates?
March 10, 2014

Math (?)
What is your question?
March 10, 2014

math(QUESTION)
Agree
March 10, 2014

psychology
Since there are so many variables in personal interaction, it might be best to use several recorded requests (same content) from both genders and have doctors respond to them. To make is double blind, a third party would be the only one who knows the gender of the speakers, ...
March 10, 2014

operations and supply
Since this is not my area of expertise, I searched Google under the key words "master production schedule" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=master+production+schedule&ie=UTF-8&oe=UTF-8 In the future, you can find the...
March 10, 2014

statistics
I'm not sure what you might be asking. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
March 10, 2014

algebra
Cannot copy and paste here.
March 9, 2014

algebra (?)
No drawing seen. Cannot copy and paste here.
March 9, 2014

Statistics
Is that value the Z score or the probability? Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.095) and its Z score.
March 9, 2014

Child Care
Here are some methods for learning this, but I agree the Pre-K is probably too young for them to absorb the lesson. http://drdavespsychologypage.homestead.com/Prejudice__Us_vs_Them.pdf http://drdavespsychologypage.homestead.com/Prejujdice__Causes_and_Solutions.pdf http://...
March 9, 2014

Statistics
The mean serves as a fulcrum or balance point for a distribution. Therefore the difference from 30 must be the same on both sides. A wide variation of values could fit both situations. However, in the second situation, all scores could be 30.
March 9, 2014

math
40 * $7.60 = ?
March 8, 2014

Algebra 1
Assuming that there is no door or the door is painted as part of the wall: Ceiling = 9 by 7 = ? Opposite walls = 2(8*7) + 2(8*9) = ? Combine all of above and divide by 275. Any fraction would be left over.
March 8, 2014

Algebra 1
There are 89 two-digit numbers (10-99). The tens digits are higher in 10, 20, 21, 30, 31, 32 etc. Count them up.
March 8, 2014

Algebra 1
Since only the middle group have iPhones, 12%.
March 8, 2014

Math
Online "^" is used to indicate and exponent, e.g., x^2 = x squared. f(x) = 2x^2 – 3 = 2*2*2 - 3 = ?
March 8, 2014

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3/8 * 3/8 = ? 3/8 * (3-1)/(8-1) = ?
March 8, 2014

Statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. OR… http://davidmlane.com/hyperstat/z_table.html
March 8, 2014

Statistics
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.
March 8, 2014

math
y = (9 * 11 * 11) + 9 = ?
March 7, 2014

Science
It's a start, but I will let you elaborate it.
March 7, 2014

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