Thursday
January 19, 2017

# Posts by PsyDAG

Total # Posts: 22,864

Geometry
Four 90 degree angles are formed by intersecting perpendicular lines.
January 18, 2017

Math
11 + .21m = 20 + .10m Solve for m.
January 18, 2017

maths
15/p = 3 Solve for p.
January 18, 2017

Algebra
It would help if you proofread your questions before you posted them. Insufficient data.
January 18, 2017

Algebra 2
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. Multiply that by 200.
January 18, 2017

Math
5 + .8W ? 36 Solve for W.
January 18, 2017

math
Is it [(5-2)*.5][(4-2)*.5](63) or 5(-2*.5)4(-2*.5)(63)? Assuming the former, = (3*.5)(2*.5)(63) = (1.5)(1)(63) Take it from there.
January 18, 2017

value
It would help if you proofread your questions before you posted them. Need to know units. 50 what? "63 persquare" what?
January 18, 2017

Triangles math
No, first triangle at 50% would have sides half of the original. Second would have sides 3 times the original. Third would have sides 5 times the original.
January 18, 2017

Data analysis statistics and probability
Subtract each month from the previous month and compare.
January 17, 2017

math
It would help if you proofread your questions before you posted them. "if the...?" 6 3-inch diameter circles can be cut within a 6 by 9 inch sheet.
January 17, 2017

mathematics
It would help if you proofread your questions before you posted them. "tsh32850"?
January 17, 2017

math (?)
What is the significance of the colons (:)?
January 16, 2017

Maths
1 m^2 = approx 1.2 sq. Yards. 14 * 1.2 * 18 = ?
January 13, 2017

Math
N = 4P N - P = 30 Substitute 4P for N in the second equation and solve for P.
January 12, 2017

Math
It would help if you proofread your questions before you posted them. 220 - 220/4 = 220 - 55 = 165 Assuming that you mean 20% of the remaining cards, 165 - .2(165) = 165 - 33 = 132 132 - 15 = 117
January 12, 2017

Math (?)
You need to include the original problem, so we have some idea about what you are asked.
January 11, 2017

Math, Algebra
If he sent 100 texts each month, that is a total of 400 texts during the 4 month period. 4(45.99) + 400x = 207.96 183.96 + 400x = 207.96 400x = 24 x = .06
January 11, 2017

Math
Welcome
January 11, 2017

Math
agree 1-3. 4. Assuming 2/2 is the power for 14-2, 2/2 = 1. What is any value to the first power? If formula was (5(14-2)^2)/2, then you are correct. agree with 5.
January 11, 2017

ELA
January 11, 2017

Probability
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 9/56 * (9-1)/(56-1) * 7/(56-2) * (7-1)/56-3) = ? Which formula would fit best?
January 10, 2017

math
12*6*3 = ?
January 10, 2017

math
January 10, 2017

science
Cannot diagram here.
January 9, 2017

mosab bin omair
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. I cannot make sense of your question. Maybe someone with physics/chemistry background could. Online, “*” is used to indicate ...
January 9, 2017

Math (?)
It would help if you proofread your questions before you posted them. "? of the students were 8th graders".
January 8, 2017

Math
Is this the elimination method? Multiply by 24. 6n - 4m = -24 Multiply by 10. 2m + 5n = 100 Multiply second equation by 2. 10n + 4m = 200 Add the two equations. 16n = 76
January 8, 2017

Maths (?)
It would help if you proofread your questions before you posted them. "...\$2000 per year for ? years...."
January 6, 2017

math
Get an equation in terms of just one of the values. q = 2n-8 = 2(2d-2)-8 2(2d-2)-8 = 1.60 + 4(2d-2+d) Solve for d, then n and q.
January 5, 2017

math (?)
No drawing. Cannot copy and paste here.
January 5, 2017

Math
d = 3q+8 .10d + .25q = 12.20 .10(3q+8) + .25q = 12.20 Solve for q, then d.
January 5, 2017

Edit/Revise
"it is faster than using the DVD drive" I don't know about others, but I just slip my DVD into the DVD drive in the side of my iMac to play or record. Very easy. No noise either. If this is true for other computers, do you want to use those points for your ...
January 4, 2017

Math
How do you get it "5 cm wide... cut from all around" when it only measures 2 cm in one direction? As far as I can tell: The area cut would be 5*2 = 10 cm^2 The remaining area would b3 25*2 = 50 cm^2
January 3, 2017

Maths
January 3, 2017

sceinc
The one with the lesser mass.
January 3, 2017

maths
It would help if you proofread your questions before you posted them. "reaping"? Why is fencing 1.20 per 100 SQUARE meters? 1.20/100 = x/3200(?)
January 3, 2017

biology
No figure. Besides, 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.
January 3, 2017

Math (?)
What do you win?
January 2, 2017

Statistics (Oooops)
That would be for finding the distribution of means. Use the equation: Z = (score-mean)/SD
January 2, 2017

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 (.75) and its Z score. Insert data into first equation and solve for score.
January 2, 2017

Physics needs help
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
December 26, 2016

Biology
Assuming that you mean a control group, to see if the independent variable makes a difference.
December 25, 2016

Maths
89/18 = 4.9444 .9444 * 18 = ?
December 25, 2016

Math
If dealing with discrete whole units, 25. If not, 24.5.
December 24, 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 I'll let you do the ...
December 22, 2016

Algebra 1
Here is what I get: x^2 - (x-3)^2 = x^2 - (x^2 - 6x + 9) = x^2 - x^2 + 6x - 9) = 6x - 9 Typos?
December 22, 2016

algebra
95 < 75 + .80m Solve for m.
December 21, 2016

No segment. Cannot copy and paste here.
December 21, 2016

math
Cannot draw here.
December 21, 2016

math
Any parentheses?
December 21, 2016

math
December 17, 2016

Working with Events
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. P(w) = 10/44 * (10-1)/(44-1) = ? P(b) = 12/44 * (12-1)/(44-1) = ? Either-or probabilities are found by adding the individual ...
December 16, 2016

Math
Jess is right for the first part. Z = (score-mean)/SD Insert the values and compute.
December 15, 2016

math
Emily = 5u John = (1-8/13)u
December 15, 2016

English
Both 2 and 4 are incorrect.
December 15, 2016

English
No. http://writingexplained.org/was-vs-were-difference
December 15, 2016

math (?)
No scatterplot. Cannot copy and paste here.
December 15, 2016

Plz check (partial)
1. DK, but guess at D 2. Agree 3. Agree 4. agree 5. agree 6. agree 7. agree 8. agree DK the rest.
December 15, 2016

bio
Since this is not my area of expertise, I searched Google under the key words "trophic levels" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=trophic+levels&ie=UTF-8&oe=UTF-8 In the future, you can find the information you desire ...
December 15, 2016

math
80 = one time fee x = number of months 55 = fee per month
December 15, 2016

math
(w+11)/7 = ?
December 14, 2016

Math
The mean is a fulcrum (balance point) for the distribution. The median is the 50th percentile. a) disagree b) agree
December 14, 2016

Math
Arrange data better. 2 and under 17% 3-5 19% 6-9 24% 10-12 13% 13 and over 27% a) agree b) disagree c) agree d) agree
December 14, 2016

Find the probability that a person has the virus
48/5730 = ? 416/721 = ?
December 14, 2016

Science
72/6 = ?
December 14, 2016

Biology
You cannot copy and paste here.
December 14, 2016

math, algebra
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. This is much more than algebra.
December 14, 2016

statistics
What is the variable in the distribution?
December 14, 2016

Math
Are you asking for the probability that the other two children are male? If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Approx. 1/2 * 1/2 = 1/4 The probabilities are not ...
December 13, 2016

Algebra
It only costs \$4.80 to produce an additional 4 units? That is \$1.20 per additional unit. \$204.80 + 10(\$1.20) = ? Typos?
December 13, 2016

Math
12x - 3x + 15y + 1 + 8x - 20y = 17x - 5y + 1
December 12, 2016

English
We took the available food without being served.
December 12, 2016

English
The subject pronouns include I, he, she, you, it, we, and they. The second type of pronoun is an object pronoun, which takes the place of a noun that receives the action. Objects in sentences usually occur in the predicate of the sentence. The object pronouns include me, you, ...
December 12, 2016

Science
It would help if you proofread your questions before you posted them. Do not know what color flowers the "plant" has, so I assume white. If so, I would guess B.
December 12, 2016

math
X - 3/8X - 2/5(1-3/8)X = \$15 Solve for X.
December 12, 2016

Math
The median is essentially the 50th percentile. Think of the mean as a fulcrum or balance point. a) disagree b) disagree c) agree
December 11, 2016

Sports
Since this is not my area of expertise, I searched Google under the key words "law 'handling the ball' in the field of cricket" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=law+'handling+the+ball'+in+the+field+of...
December 11, 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.
December 11, 2016

Science
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.
December 10, 2016

Probability
http://www.mathwords.com/c/combination_formula.htm
December 10, 2016

Probability (?)
Lack Data
December 10, 2016

Math (Ooops)
Sorry, B. https://www.mathsisfun.com/definitions/coefficient.html
December 10, 2016

Math (Polynomials)
4x^2+3x-3
December 10, 2016

Algebra
December 10, 2016

math
Cannot post distributions here.
December 10, 2016

statistics
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 12/24 * (12-1)/(24-1) = ?
December 10, 2016

Anatomy and Physiology
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. What are your best answers?
December 10, 2016

Algebra, Solving inequalities
1. Subtract 5h from both sides and add 16 to both sides. 2.Add 13 and subtract 4x from both sides. Looks like there is a typo somewhere. 3. Don't know. 6. Add 12 to both sides. 7. Divide both sides by 12. 8. When multiplying/dividing inequalities by a negative number, the ...
December 9, 2016

Science
An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable.
December 9, 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-.12)(1-.29) = ? B) It is in your data, .07.
December 9, 2016

statistics
Z = (score-mean)/SD = (844-541)/101 = 303/101 = 3
December 8, 2016

Math Probability Distribution
It would help if you proofread your questions before you posted them. "lies between 57 - c and 57 - c" = 0 98% = mean ± Z (SD) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the ...
December 8, 2016

Math Probability Distribution
It would help if you proofread your questions before you posted them. "lies between 57 - c and 57 - c" = 0 98% = mean ± Z (SD) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the ...
December 8, 2016

Science
Consult text or Google it. I searched Google under the key words "blood flow through body and heart" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=blood+flow+through+body+and+heart&ie=UTF-8&oe=UTF-8 In the future, you can find ...
December 8, 2016

Science (?)
No following. Cannot copy and paste here. Mars is smaller, so gravity is less.
December 8, 2016

1. Pages:
2. 1
3. 2
4. 3
5. 4
6. 5
7. 6
8. 7
9. 8
10. 9
11. 10
12. 11
13. 12
14. 13
15. 14
16. 15
17. Next>>