# Posts by PsyDAG

Total # Posts: 23,386

**maths**

Welcome

**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 (?)**

What is your question?

**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**

Still don't know your question.

**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.

**math 6th grade ?**

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?

**6th grade math**

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**

https://www.google.com/search?client=safari&rls=en&q=graph+information+from+a+ratio+table&ie=UTF-8&oe=UTF-8&gws_rd=ssl

**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.

**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.

**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 = ?

**8th grade math-exponents**

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.

**8th grade math-exponents**

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**

Since we don't know your daily activities, we cannot help you.

**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.