Saturday
April 25, 2015

Posts by PsyDAG


Total # Posts: 19,715

Math
Right.
March 24, 2015

Biology
Google each term.
March 24, 2015

maths
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Since 3 sides are even and 3 are odd, the chances of even = 3/6 = 1/2. For three dice, probability of all even = (1/2)^3 = 1/2...
March 24, 2015

Math, Algebra
B = A/2 B = C + 1/12 = 1/6 + 1/12 = 2/12 + 1/12 = ? Put answer to second equation into the first to find A, then add the two.
March 24, 2015

Math
If it is a rectangular prism, why would you sketch a triangle? First, find the perimeter, 2L + 2W. Then multiply by 200/4, "the top quarter of each vertical face."
March 23, 2015

statistis
Range = highest score - lowest. Find the mean = 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...
March 23, 2015

pls help me pre algebra
2^3/2^3 = (2*2*2)/(2*2*2) They cancel each other out, which gives you 1.
March 23, 2015

math
Also, indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
March 23, 2015

expressions
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. I agree with your answers. 5^2 * 5^4 = 5^6 3^3 * 3^6 = 3^9
March 23, 2015

Statistics
Z = (score-mean)/SEm SEm = SD/√n Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to your Z scores.
March 23, 2015

algebra
7.2 - 8.6 + 9.3 + 5.4 = 13.3
March 23, 2015

Probability & Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (± .025) and its Z score = 1.96 95% = mean ± 1.96 SEm SEm = SD/√n
March 23, 2015

biology/evolution
Does it fool pollinators into believing that it does?
March 22, 2015

analytical tools
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .74^4 * (1-.74) = ?
March 22, 2015

Biology needs help
Medhat's response makes it look like the post has been answered.
March 22, 2015

Probability and Statistcis
I don't know what five numbers you are seeking, but this might be a partial response. 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 ...
March 22, 2015

Statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .05^10 = ?
March 22, 2015

Science Please
6. correct 7. wrong 8. right 9. wrong 10. disagree
March 22, 2015

Biology
Right, all are tall and half are yellow.
March 22, 2015

math
"Before the third card is chosen" means a 1 is chosen as either the first card or second card. Probability of 1 being chosen as first card = 2/6. Assuming that the first card was not a 1, the probability of 1 being chosen as a second card = 2/5. Either-or ...
March 22, 2015

Psychology help
Not sure what you seek. Acknowledging positive achievements?
March 22, 2015

Life orientation
What is NFSAS?
March 22, 2015

math
x would be the height and 6 - 2x would be the length/width.
March 22, 2015

algebra
100 * (3,000-237)/3,000 = ?
March 21, 2015

English
"Go" is not necessary. "Sic" indicates that it was as written, even if erroneous. “you’re ready to go (sic) do something else’’ (Jordan, first name, year, possibly page if book) https://www.google.com/search?client=safari&rls=en&q=text+...
March 21, 2015

math
A = S + 8 17A + 9S = 4,400 Substitute S+8 for A in the second equation and solve for S. Insert that value into the first equation to solve for A. Check by putting both values into the second equation.
March 21, 2015

Math
We cannot graph on these posts.
March 21, 2015

maths
Convert cm to mm by multiplying by 10. V = πr^2h = π * 140^2 * 100 = π * 19600 * 100 = 1,960,000π 1,960,000π = π2^2h = π4h Solve for h = length
March 21, 2015

math
Lacking data. How many numbers are there? The probability of hitting a particular number is the same no matter which spin it is.
March 21, 2015

Help with Psychology regarding Positive Correlatio
With a positive correlation, both variables increase/decrease together.
March 21, 2015

Genetics (science)
Both are Bb. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
March 21, 2015

Science
Man is FF, woman is aa. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
March 21, 2015

statistic
No data. You cannot copy and paste here.
March 21, 2015

statistics (jay)
If you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.
March 20, 2015

statistics (etoile)
Ho: M = E Ha: M < E 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 ...
March 20, 2015

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/14 * 1/13 * 1/12 = ?
March 20, 2015

math
(x - .30) = 3(24.95) + 2(45) Solve for x.
March 20, 2015

math
A square would maximize the area. 400/3 = ?
March 20, 2015

geometry
B = 3C + 22 86 + B + C = 180 Substitute 3C+22 for B in the second equation and solve for C.
March 20, 2015

Tsi math
Perimeter = 2L + 2W (2*20 + 2*7) *.98 = ?
March 20, 2015

math
80 - 13 - 10 = 57 Since that number is odd, how could he have an equal number? Do you have typos?
March 20, 2015

english
Not unless you post it. You cannot copy and paste here.
March 19, 2015

Math
Hint: When multiplying/dividing, the exponents are added/subtracted respectively.
March 19, 2015

Math
3.25*10^-22 * 3*10^3 = ?
March 19, 2015

MATH SUPER HELP!
1 gm = 1000 mgm 1 liter = 1000 ml 1 m = 10 cm Use those equivalents to find your answers.
March 19, 2015

Math
Plot the points out on graph paper to see what you get. It could be more than one of the alternatives.
March 19, 2015

Math
average = mean = ∑x/n = (.82+.89+.77)/3 = ?
March 19, 2015

environmental science
Availability of food and mates? Safety from predators?
March 19, 2015

math
agree.
March 19, 2015

math help please
Agree.
March 19, 2015

biology
From the F1 generation, I would assume that Tall is dominant and short is recessive. What genotypes would give you approximately 25% short. Cannot draw a Punnett square here.
March 19, 2015

sociology
Math, English, Science, etc.? Elementary, Middle School, High School, Etc.?
March 19, 2015

math
I assume you mean cm^2 for area. 3003.014/32 = ?
March 18, 2015

Math needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. Online "^" is used to indicate an exponent, e.g., x^2 = x squared.
March 17, 2015

statistics
a-c. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities of the Z scores. Multiply by 100 to get percentage. d. Go to table first to find Z, then insert into...
March 17, 2015

Math
None of the opposite sides form any triangle. A triangle needs three sides.
March 17, 2015

Psychology
How the genotype effects the phenotype?
March 17, 2015

mensuration
It would help if you proofread your questions before you posted them. Missing data, "breadth is ___ cm."
March 17, 2015

math
What table?
March 17, 2015

math
We cannot draw pictures on these posts. Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 3 * 50 = 150
March 17, 2015

Statistics
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., even though I don't know what 5 steps you mean. Z = (...
March 16, 2015

Math
Parallelogram, rectangle?
March 16, 2015

sciences
How do you expect us to "explain in your own words"?
March 16, 2015

math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .30 * 120,000/1,800,000 = .30 * 12/180 = ?
March 16, 2015

Math
Whether -9 or 9, x^2 = 81 81 + z = 103
March 16, 2015

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 16, 2015

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 between the two Z scores.
March 16, 2015

Statistics
Z = (score-mean)/SEm SEm = SD/√n 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 16, 2015

life orientatiton
What is "nfsas"?
March 15, 2015

Statistics
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 15, 2015

English Literature
Since this is not my area of expertise, I searched Google under the key words "Pietism and the American Character" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=Pietism+and+the+American+Character&ie=UTF-8&oe=UTF-8&gws_rd=ssl In ...
March 15, 2015

algebra
x ≠ 3x Online "^" is used to indicate an exponent, e.g., x^2 = x squared. If you mean x = 3, the 8x^2 + 4x = 8 * 3 * 3 + 4 * 3 = ?
March 15, 2015

math
What about the other 9 students? Cannot display Venn diagram here.
March 15, 2015

math
I don't know about the "formular," but the other two sides could be 50m each, with the area = 50^2.
March 15, 2015

algebra
No table.
March 14, 2015

spanish
Did your look up each term in your Spanish dictionary? I did. B
March 14, 2015

Algebra
Definitely don't take plan three at $30/minute. After first month: One: $19.99 + $25 + .32m Two: ($70-$40) + $30 + .30m Three: $28 + $30m At beginning of month, there are no minutes.
March 14, 2015

Stats
SEm = SD/√n
March 13, 2015

Statistics
mean = ∑x/n = 980/14 = ? Subtract each of the scores (# in each class) 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 I'll let you do the ...
March 13, 2015

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 13, 2015

science
Sperm and egg each have the haploid number of chromosomes = 23. Of these, only one is a sex chromosome, X for females and either X or Y for males.
March 13, 2015

Science Help Please
Agree.
March 13, 2015

Separation processes
Since this is not my area of expertise, I searched Google under the key words "bubble-point line" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=bubble-point+line&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
March 13, 2015

Science Help
disagree.
March 13, 2015

Science - 7th grade (repost)
38. agree 48. C 49. Not sure 57 - 59. Yes
March 12, 2015

satistics
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. Hint: in smaller portion.
March 12, 2015

Math
Including the four in the corners, 16.
March 12, 2015

math
For each increase on the left, you lose 3 on the right.
March 12, 2015

Science - 7th grade
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 12, 2015

statistics/probability
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability between the two Z scores.
March 12, 2015

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.
March 12, 2015

Maths
https://www.google.com/search?client=safari&rls=en&q=Factorizing+trinomials&ie=UTF-8&oe=UTF-8&gws_rd=ssl
March 12, 2015

Math
W = 3/4L WL = 432 Substitute 3/4L for W in the second equation and solve for L. Insert that value into the first equation to solve for W. Check by putting both values into the second equation.
March 11, 2015

math
W = 2/3L WL = 864 Substitute 2/3L for W in the second equation and solve for L. Insert that value into the first equation to solve for W. Check by putting both values into the second equation.
March 11, 2015

Science - 7th grade
Right on all counts.
March 11, 2015

statistics (Agnes)
First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked. What is your question?
March 11, 2015

statistics (Stuart Joel)
Z = (score-mean)/SEm SEm = SD/√n 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 11, 2015

science
Since this is not my area of expertise, I searched Google under the key words "apparent vs absolute magnitude" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=apparent+vs+absolute+magnitude&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the ...
March 11, 2015

science
https://www.google.com/search?client=safari&rls=en&q=moon+rotation+and+orbital+period&ie=UTF-8&oe=UTF-8&gws_rd=ssl
March 11, 2015

Stats
(9-3.25)/9 = ?
March 11, 2015

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