# Posts by PsyDAG

Total # Posts: 23,976

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 ...

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

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

Statistics
True

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...

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.

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.

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.

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.

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

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

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.

Pre-Algebra.
Round to .001?

biology
Consult blood flow diagram on Google.

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...

Biology
What are your choices? will, basic?

Math
What are you choices? You cannot copy and paste here.

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

elementary algebra
44/(7+4) = 44/11 = 4 7 * 4 = 28 4 * 4 = 16 16 + 28 = 44

Math (?)

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

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

Math
5/6 * 3/10 = ?

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

math
Cannot construct an equi quadrilateral here.

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 ...

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 ...

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 ...

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.

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

English( PLS HELP!!)
Welcome

Science
water

stats
integers

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

Biology

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.

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.

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

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

math
3x = x + 48 Solve for x.

Math
Cannot draw diagrams on these posts.

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

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

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?

Lacking data. How big are the shelves?

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

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

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...

SCIENCE
100kW/m^2

Math

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

algebra
.5 + .5d = 7.5 Solve for d.

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

Algebra
Multiply each term in the second parenthesis by -1.

Algebra
-4+c

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.

statistics
Cannot do table on these posts.

math
300x + 250x = 900 Solve for x.

math algebra
See following post.

math algebra
16-17 minutes

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 = ?

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.

Science
Sit different distances from the fulcrum.

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.

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.

Math
1/2 + 3/8 = 4/8 + 3/8 = ?

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.

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?

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

math
Necesita hacer su pregunta en inglés.

Math
do the calculations

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...

math (?)
Typo? How can a digit be 30 times any other digit?

Math
How do you want it rearranged?

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

Psychology
Agree, "making excuses" is rationalization.

English
I, his, him and he are pronouns. You missed some. Go over it again.

Math
You only have five digits. Assuming some can be repeated without using decimals: Largest = 8,885,320 Smallest 2,000,358

Statistics
mean = ∑x/n mean * N = ∑x Men ∑x = 20*178 = 3560 Women ∑x = 30*164 = 4920 Combined = (3560+4920)/50 = ?

Psychology 101
success

Math (?)
Have ? Left.

math
typos? (2700-1200)x = 30

English
I assume it is study time. It indicates how much time you need to allocate per week, month and semester. How much time will you set aside per each of those time intervals?

math

Math
Since this is not my area of expertise, I searched Google under the key words "making a crossword puzzle" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=making+a+crossword+puzzle&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can...

Math
(215.5-133.25)/215.5 = .38167 = 38% Do the same process for the second problem.

English grammar
"Talked" if event is past, and "will talk" if you expect it in the future.

Health
Which does not have a learning component?

algebra - theory of numbers
You need to clarify your question.

math
3d + 3t = 9 3d + 2t = 8 Subtract second equation from first, then multiply by 5.

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 between the two values for the Z scores.

Maths
X + Y + Z = 1750 x = 4Y Y = 2Y 4Y + Y + 2Y = 1750 However, that does not come out exactly to whole numbers. Do you have any typos? It would seem that the zero is extraneous.

Language Arts
The Inuit go fishing in frail skin canoes called kayaks.

psychology
deviate, innovate, criticize, dissent?

Math
Regardless of its length, the minute hand moves 360 degrees in one hour (60 minutes).

value
Since this is not my area of expertise, I searched Google under the key words "branches of home economics" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=branches+of+home+economics&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you ...

Math
W = T + 6 Area = 1/2 WT Substitute T+6 for W in the second equation and solve for T. Insert that value into the first equation to solve for W. Check by putting both values into the second equation.

math
Divide 576 by 9, then multiply by 4 for muffins and 5 for cookies. 256 muffins 320 cookies

Math
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. a^2 + b^2 = c^2 Cannot find x unless already know value of a and c. You only know c.