Sunday
January 22, 2017

# Posts by PsyDAG

Total # Posts: 22,892

Bio
May 28, 2016

Bio
DNA makes up the code for all living things.
May 28, 2016

math
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.
May 28, 2016

SCIENCE PLZZ HELP!!!
May 28, 2016

physical science (?)
No above mentioned.
May 28, 2016

Math
Do you want the discounted price? If so: (1-.55)\$16.99 = ?
May 27, 2016

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .65^4 = ?
May 27, 2016

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. When multiplying/dividing, exponents are added/subtracted respectively. 4^3 * 4^12 ≠ 4^36 (wrong) x^11/x^4 = x^7 (right)
May 27, 2016

math
Right
May 27, 2016

Biology
What various types of microscopes would you be using?
May 26, 2016

Math
1. Agree 2. disagree 6, 7, 10, 13. agree 15, ?. disagree 18. agree 19. disagree 20. 129*.25 = 32.25 Rather than typing "(my answer)," just use "***" to indicate that. It will save you lots of typing.
May 26, 2016

math
7x−2y=15 x+y=6 Multiply second equation by two and then add the equations.
May 26, 2016

It has been over a half-century since I got my license, so I can't answer all the questions. 2. agree 3. DK 4, 5, 7. Agree 8. Disagree 9. DK 10. agree 11. DK 12. agree 13. DK 14. disagree 15. All of them 16. disagree 17, 18. agree 19. "IPDE"? 20. DK 21, 22, 23, ...
May 26, 2016

Writing
Since this is not my area of expertise, I searched Google under the key words "animal vs plant cells" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=animal+vs+plant+cells&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find ...
May 26, 2016

math
Does "them" apply to dozens or individual bananas?
May 26, 2016

math
1.06x = 75 Solve for x.
May 26, 2016

math
decimal of .25?
May 25, 2016

Math
To figure the third side, use Pythagorean theorem. 5^2 + 12^2 = h^2 This gives you the perimeter of the triangle. However, since they come in a "variety of lengths", you need more information. Also how high is the stand? What about the opening to sell the products?
May 25, 2016

Math
800 = π (r^2) h Decide on either the height or radius and solve for the other.
May 25, 2016

Math
May 25, 2016

English
I'll point out problems, and let you correct them. Better to use left and right rather than "westward" or "eastward," since you don't know what direction the person is facing. Toward which armpit? Does the person ever return to original standing ...
May 25, 2016

Chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
May 25, 2016

Probability
P(1 or 4 or 5 or 6) Either-or probabilities are found by adding the individual probabilities. That is how Ms Sue got the answer.
May 25, 2016

Probability
If "circle is yellow," there is no probability of getting a red number.
May 25, 2016

algebra
What are your choices? It would be essentially a straight line going from lower left to upper right.
May 25, 2016

math
Cannot make probability tree on these posts.
May 25, 2016

Pre alg
disagree, what is "-2x+5x"?
May 25, 2016

Literature (?)
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. What book/story does this relate to?
May 25, 2016

Chemistry needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
May 24, 2016

It doesn't matter how many slices. 2/3 of a cake is larger than 1/3 of a same-sized cake.
May 24, 2016

English
Don't know the story, but Holmes is noted for his careful and scientific solutions.
May 24, 2016

Math
5280 * .2 = ?
May 24, 2016

Maths
It would help if you proofread your questions before you posted them. From your data, it could be 863, 881, 845, 827 or 809.
May 24, 2016

statistics
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 like "...
May 24, 2016

Math
Average = mean = sum of scores/number of scores I'll let you do the calculations.
May 23, 2016

ALGEBRA
It would help if you proofread your questions before you posted them. Where did you get 3/11? From your data, I would get 1/5(letters) * 1/2(coin) = 1/10
May 23, 2016

algebra (?)
We cannot see the histograms. You cannot copy and paste here.
May 23, 2016

Geometry
Circumference = 2πr
May 23, 2016

algebra
10.5x = 7.5x + 30 Solve for x, then insert into one of the two equations to find y.
May 23, 2016

math
1. disagree, when dividing, exponents are subtracted. 2. disagree, when dividing, exponents are subtracted. 3. disagree, what is 4^-2? 4. disagree, anything to the Zero power = 1.
May 23, 2016

math
What are your answers? 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. When multiplying/dividing, exponents are added/subtracted respectively.
May 23, 2016

Math
Can get 7 with 4,3 or 3,4 or 5,2 or 2,5 or 6,1 or 1,6 out of 36 possibilities = 6/36 Use the same logic for above or below 7.
May 23, 2016

Math
7.5 gallons/cubic foot Convert to feet. V = 18 * 8 * 12 = 1.5 * 2/3 * ! = ?
May 23, 2016

Maths
M = 3D M+5 = 2.5(D+5) Substitute 3D for M in the second equation and solve for D. Insert that value into the first equation to solve for M. Check by putting both values into the second equation.
May 23, 2016

Math
8/44 = ?
May 23, 2016

Math
5/12x = 25 Solve for x. Subtract 25 from x. He will not have any chickens after 3 months.
May 23, 2016

science (?)
May 23, 2016

Math (?)
No figures. Cannot copy and paste here.
May 22, 2016

Math
Or you could try it this way. P-4 = A 6A = 4P Substitute P-4 for A in the second equation and solve for P. However, something seems askew here. Typos?
May 22, 2016

Math
6A = 4P A = 4/6P = 1/3P P = A + 4 Substitute P/3 for A in the third equation and solve for P.
May 22, 2016

math
N = 6E
May 22, 2016

maths
Cannot graph here.
May 22, 2016

Science
Since this is not my area of expertise, I searched Google under the key words "What develops from the Allantois" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=What+develops+from+the+Allantois&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the ...
May 22, 2016

Biology
What are your answers? 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.
May 21, 2016

math
1543 = 16t^2 Divide both sides by 16 and then get square root.
May 21, 2016

Math
To get product (one negative) of -36, can have 18,2 or 9,4 or 3,12. 12 - (-3) = 15
May 21, 2016

math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. a. 1/3 * 1/3 = ? b. increase, 1/2 * 1/2 = ?
May 21, 2016

math
36,336 and 63,363
May 20, 2016

Physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
May 20, 2016

math
D = L - 28 1/3L = 4/5D Substitute L-28 for D in the second equation and solve for L.
May 20, 2016

Math
I didn't even know there were "12th grade admission exams" when I was teaching. The content is likely to vary with the school district.
May 20, 2016

Statistics
Z = (score-mean)/SD A,B. 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 scores. Multiply by 100. C. Use same table to find Z for .02. Insert in above equation...
May 20, 2016

find the number
What is your answer? 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.
May 20, 2016

Algebra
I will not even get into the math. It would help if you proofread your questions before you posted them. First, you say "summarize it in one-two paragraphs," but you have four. "each country’s payroll" More than one country? Your lack of comma use is ...
May 20, 2016

Are company databases external?
May 20, 2016

Even with the errors in capitalization and punctuation, I find it readable, a. However, I agree with Writeacher that your need to avoid developing sloppy habits for business communications.
May 20, 2016

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 1. What is x*x? 2. What is -3m*8? 3. Agree. 4. What is 5b*6B? 5b*10?
May 20, 2016

math
1. Disagree. 2. disagree. 3. disagree. 4. disagree.
May 20, 2016

Math (?)
No picture. You cannot copy and paste here.
May 20, 2016

Algebra(?)
Need more data. Typos? ABCD?
May 20, 2016

Pre algebra
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/2 * 1/6 = ?
May 20, 2016

Geometry
Pythagorean Theorem a^2 + b^2 = L^2 24^2 + 10^2 = L^2
May 20, 2016

Math/ Ratios (oooops)
I'm sorry. That was past tense, "did." If so, add A and H.
May 20, 2016

Math/ Ratios
A = H (A-23)/(H-7) = 3/4 Substitute H for A in the second equation and solve for H. Insert that value into the first equation to solve for A. Add (A-23) and (H-7).
May 20, 2016

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 2*2*2 ≠ 12 However, unless you have more typos, I get 5 too.
May 20, 2016

atlantic high
Pythagorean Theorem a^2 + b^2 = c^2 a^2 + 4^2 = 8.5^2 Solve for a.
May 20, 2016

Math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 4(2/4) = 2 2*4 = ?
May 20, 2016

MAth
Add 3.6 to both sides and divide by .9 to solve for x.
May 20, 2016

science
What are your choices? Digest? Eat? Consume?
May 19, 2016

math
1.06x = 42.40 I get 40 too.
May 19, 2016

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.
May 19, 2016

statistics (?)
What does X stand for? If x is a score: Z = (score-mean)/SD
May 19, 2016

Math
P = 2L + 2W
May 19, 2016

Physical Education: Just checkin' if they're right
Free style? Agree with 300.
May 19, 2016

maths
C = 2πr = 2*3.14*(30/2) (C * 33.3)/100 = m traveled
May 19, 2016

Math
R = 25 - W 10R - 2W = 202 Substitute 25-W for R in the second equation and solve for W. Insert that value into the first equation to solve for R. Check by putting both values into the second equation.
May 19, 2016

Math (check my work)
Complementary means they add up to 90 degrees. (x+13) + (2x+23) = 90
May 19, 2016

MATH PLZ HELP
7. Disagree. 8. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 4/10 * 2/10 = ? 9. Correct 10. P(heads) = 1/2 P(<5) = P(4 or 3 or 2 or 1) Either-or probabilities are found ...
May 19, 2016

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. assuming you want price per gallon: 10.75 * 12/128 = 1.008 gallon = \$15.65, but \$15.53 is the closest.
May 19, 2016

math
Either-or probabilities are found by adding the individual probabilities. P(<4) = P(3 or 2 or 1) = 1/6 + 1/6 + 1/6 = ?
May 19, 2016

Stuck in a Question
Does the definition sound uncertain? Critical?
May 19, 2016

algebra II
Q = 120 - D .25Q + .10D = 19.05 Substitute 120-D for Q in the second equation and solve for D. Insert that value into the first equation to solve for Q. Check by putting both values into the second equation.
May 19, 2016

Languge arts (?)
What is a "tang town"?
May 19, 2016

math !
Welcome
May 19, 2016

math !
1) An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable. A dependent variable is the response or measure of results. 2) not an inequality. 60/15 = 4 3) anything < 14 ...
May 19, 2016

math
75/1.5 = 50 mph 325/50 = ?
May 19, 2016

geometry
the first two are correct, but I can't answer the following because the figures are not given.
May 19, 2016

Artificial Intelligence
If B is pardoned, either A or C will be executed, 1 out of 2.
May 19, 2016

Science (?)