Saturday
October 22, 2016

# Posts by PsyDAG

Total # Posts: 22,519

math (stats)
Examples P(not green) = 1 - .15 = ? Either-or probabilities are found by adding the individual probabilities. P(blue or orange) = P(blue) + P(orange) If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of ...
October 2, 2016

Science
14 days = 14 * 24 * 60 * 60 seconds 2.5 m = 2.5 * 1,000,000 micrometers micrometers/seconds = ?
October 2, 2016

Algebra
L = 2W L*W = 259 Substitute 2W for L in the second equation and solve for W.
October 2, 2016

Math (?)
Lack data. Cannot copy and paste here.
October 2, 2016

Math work
Either-or probabilities are found by adding the individual probabilities. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. P(RB) = 7/38 * (7-1)/(38-1) = ? P(L) = 11/38 * 10/37...
October 2, 2016

Math (?)
Typos? Smallest digit means in one's place? 245 one digit MORE than the digit in the tens place?
October 2, 2016

Genetics
http://blogs.sciencemag.org/pipeline/archives/2016/04/18/the-myth-of-ethidium-bromide For further info, Google other sources.
October 2, 2016

Finite math and probability
P(Blue) = 7/16 P(Even) = 7/16 Either-or probabilities are found by adding the individual probabilities.
October 2, 2016

Principle of color
complement of red = green https://www.google.com/search?client=safari&rls=en&q=complement+of+red+color&ie=UTF-8&oe=UTF-8&gws_rd=ssl
October 2, 2016

principles of color
get it less saturated?
October 2, 2016

algebra
October 1, 2016

math
If it is not a continuous variable, 25. If continuous, 24.5.
October 1, 2016

maths
(2x)^2 --> 4Y 4Y is 300% greater than Y.
October 1, 2016

Probability
4/52 * 3/51 * 2/50 * 4/49 * 3/48 = ?
October 1, 2016

stats
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (.52)^4 * (1-.52) = ?
October 1, 2016

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (1-.569)^3 = ?
September 30, 2016

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Online "^" is used to indicate an exponent, e.g., x^2 = x squared. 3*10^-8 seconds = 1 m 3 seconds = ?m I'll let you find the solution.
September 30, 2016

Stat 154
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 5/100 * 4/99 * 95/98 * 94/97 * 93/96 * 92/95 * 91/94 * 90/93 = ? Or you could explore combinations and permutations. https://www...
September 30, 2016

Math
To solve for t (I'm assuming that is what you want to do.): Multiply both sides by 4 to get rid of the divisor. 2t + 14 = 3t + 36 Combine terms.
September 30, 2016

Math (?)
\$8, unless you want to define your "four step plan."
September 29, 2016

Psychology
They differ in emphasis, especially motor functions, but interact via the corpus callosum. https://en.wikipedia.org/wiki/Lateralization_of_brain_function
September 29, 2016

maths
Welcome
September 29, 2016

maths
Only one possible outcome. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. P (Both lemon) = 5/9 * (5-1)/(9-1) = ? P (both orange) = 4/9 * 3/8 = ? Either-or probabilities are ...
September 29, 2016

Grammar
She lit scented candles, so the air will smell sweetly.
September 29, 2016

math
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. 2x^2 - 6x - cx + a + 6
September 29, 2016

statistics
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. Standard deviation = square root of variance Z = (score-mean)/SEm SEm...
September 29, 2016

Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability in the smaller area for the Z score of 1.32.
September 28, 2016

Statistics
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability for the Z score of 1.32.
September 28, 2016

Statistics
Mutually exclusive — each thing makes the other thing impossible : not able to be true at the same time or to exist together. Independent — one variable does not effect another. If they are neither, they can occur together and one variable effects another.
September 28, 2016

foundations of algebra
x = first piece x+15 = second piece 2x+5 = third piece x + (x+15) + (2x+5) = 100 Solve for x, then others.
September 28, 2016

Math
To me, if it moves "10 feet in 2 minutes," then it would move 5 feet in one minute. 5 ft ≠ .2 ft
September 28, 2016

statistics
Rolls < 6. 1, 1 1, 2 1, 3 1, 4 2, 1 2, 2 2, 3 3, 1 3, 2 9/36 = ?
September 28, 2016

math
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 between the two Z scores. Multiply by 250.
September 27, 2016

Pre-Algebra.
Round to .001?
September 27, 2016

biology
Consult blood flow diagram on Google.
September 27, 2016

Science
Since this is not my area of expertise, I searched Google under the key words "natural social systems " to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=natural+social+systems&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find...
September 27, 2016

Biology
What are your choices? will, basic?
September 27, 2016

Math
What are you choices? You cannot copy and paste here.
September 27, 2016

statistic
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.
September 27, 2016

elementary algebra
44/(7+4) = 44/11 = 4 7 * 4 = 28 4 * 4 = 16 16 + 28 = 44
September 27, 2016

Math (?)
September 27, 2016

Math
at 1 cm each cut, 21 + 27 = 48
September 27, 2016

Math (?)
It doesn't make sense. Summing two positive numbers will not get a negative.
September 27, 2016

Math
5/6 * 3/10 = ?
September 27, 2016

Maths
It would help if you proofread your questions before you posted them. x = 75 degrees
September 27, 2016

math
Cannot construct an equi quadrilateral here.
September 27, 2016

Sociology
I searched Google under the key words "basic logic of probability sampling" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=basic+logic+of+probability+sampling&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
September 27, 2016

Statistic
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (a) .58 * .58 (b) .42 * .42 (c) "at least one" = one or two P(2) = (a) P(1) = .58 * .42 Either-or probabilities are ...
September 26, 2016

math (partial)
(A) 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. Standard deviation = square root of variance Z = (score-mean)/SEm ...
September 26, 2016

math
99% = mean ± Z (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 (.005) in the smaller area and its Z score. Insert data into equations above.
September 26, 2016

Math
Cannot draw tables on these posts. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. p(0) = 1/10 * 1/10 P(1) = 9/10 * 1/10 P(2) = 9/10 * 9/10
September 26, 2016

stats
integers
September 26, 2016

psychology
We do not know the behaviors "you exhibit every day" outside of eating, drinking, breathing, sleeping, urinating and defecating.
September 25, 2016

Biology
September 25, 2016

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 for each Z score. For last question, use the table to find .05 and insert its Z score in the equation above.
September 25, 2016

math
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. Conclusion would be related to level of significance you are using.
September 25, 2016

Algebra
2x + (x-3) = 42 Solve for x to get twins' age and subtract 3 for 3rd child.
September 25, 2016

algebra
Volume = w * h * L 18 = (5-2) * 1 * L Solve for L.
September 25, 2016

math
3x = x + 48 Solve for x.
September 25, 2016

Math
Cannot draw diagrams on these posts.
September 25, 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.
September 25, 2016

math
A circle has no volume, however, its area = πr^2.
September 25, 2016

It would help if you proofread your questions before you posted them. "13 4 feet wide" = 134, 13.4, 13feet 4 inches? Also lacking data. How much lumber did he buy? How big are DVD cases and paperback books?
September 24, 2016

Lacking data. How big are the shelves?
September 24, 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.
September 24, 2016

Maths
We do not have access to the figure. You cannot copy and past here.
September 24, 2016

Biology
Since this is not my area of expertise, I searched Google under the key words "hydrogen bonding water molecule properties" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=hydrogen+bonding+water+molecule+properties&ie=UTF-8&oe=UTF-8...
September 24, 2016

SCIENCE
100kW/m^2
September 24, 2016

Math
September 23, 2016

Grammar
What about commas? Thank you, John, Peter, Susan and Veronica, for being a part of the crew.
September 23, 2016

algebra
.5 + .5d = 7.5 Solve for d.
September 23, 2016

Math
The two end digits cannot be even because subtracting one from the other would be an even difference. Explore the odd choices. 123, 345, 567, 789
September 23, 2016

Algebra
Multiply each term in the second parenthesis by -1.
September 22, 2016

Statistics
Z = (score-mean)/SD SD = √variance 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. Multiply by 100.
September 22, 2016

statistics
Cannot do table on these posts.
September 22, 2016

math
300x + 250x = 900 Solve for x.
September 22, 2016

math algebra
See following post.
September 22, 2016

math algebra
16-17 minutes
September 22, 2016

Stats.
Neither probability = 0. Weight 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. Food 24 - 10 = 14 (15-10)/14 = ?
September 21, 2016

algebra
In the first pair, none match, because if x is negative, y will be negative. Did you miss a negative sign? The second problem is wrong. Do what Lily suggests.
September 21, 2016

Science
Sit different distances from the fulcrum.
September 21, 2016

Science
A. Have the beaker standing on a table. B. Wash the toes with water or something that will neutralize solution A, being careful to avoid the glass particles.
September 21, 2016

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.
September 21, 2016

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.
September 21, 2016

Math
1/2 + 3/8 = 4/8 + 3/8 = ?
September 21, 2016

I don't. I still get: (x/2)^7/(x/2)^6 = x/2 If you do not have a typo, there might be a typo in the text answers. Ask your teacher.
September 21, 2016

Since they are all the same, let x represent x/2. Online "^" is used to indicate an exponent, e.g., x^2 = x squared (x^3 * x^4)/(x^3)^2 When multiplying/dividing, exponents are added/subtracted respectively. (x^3 * x^4) = x^7 (x^3)^2 = x^6 Do you have typos?
September 21, 2016

Algebra 2
Z = (score-mean)/SD Z = (230-240)/4.8 = -2.08 Use the same equation for the second score.
September 21, 2016

math
Necesita hacer su pregunta en inglés.
September 20, 2016

Math
do the calculations
September 20, 2016

Science
Since this is not my area of expertise, I searched Google under the key words "watershed" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=watershed&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information you desire...
September 20, 2016

math (?)
Typo? How can a digit be 30 times any other digit?
September 20, 2016

Math
How do you want it rearranged?
September 20, 2016

Maths
42/7 = 6 2L = 3*6 = 18 2W = 4*6 = 24 Since P = 2L + 2W, each side will half of the above values.
September 20, 2016

Psychology
Agree, "making excuses" is rationalization.
September 20, 2016