Thursday
February 23, 2017

Posts by PsyDAG

Total # Posts: 23,035

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
It would help if you proofread your questions before you posted them. "rat angled"? https://www.google.com/search?client=safari&rls=en&q=scalene+triangle+definition&ie=UTF-8&oe=UTF-8
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

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

math
Cannot draw here.
December 21, 2016

math
Any parentheses?
December 21, 2016

math
What are your choices?
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
What virus?
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

Algebra
Agree
December 13, 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 (Polynomials)
Welcome
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
What is your question?
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

Science
lead
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

math
The common denominator would be 50.
December 8, 2016

Algebra 2(help please!!)
(a) It is direct. (b) Knowing they are being observed may change behavior. (c) Sample = 10 students Population = all high school students (d) I would say none, because the sample is too small and b.
December 7, 2016

Math
You need to post the specific questions.
December 7, 2016

math
My son's name.
December 7, 2016

Math
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 (.30) and its Z score. Insert data into above equation to solve for the score.
December 7, 2016

Algebra
Need some indication of twins' ages.
December 7, 2016

Algebra
It would help if you proofread your questions before you posted them. "$2.00"?
December 7, 2016

Math
The number ? is a mathematical constant, the ratio of a circle's circumference to its diameter, commonly approximated as 3.14159. It has been represented by the Greek letter "?" since the mid-18th century, though it is also sometimes spelled out as "pi"...
December 7, 2016

math
T = .9(30) = ? P = .78(90) = ?
December 7, 2016

Science
No illustration. You cannotcopy and paste here. They are all related to reproduction.
December 7, 2016

math
More data needed.
December 7, 2016

Math
(1-.6)x = 240 Solve for x.
December 7, 2016

maths
8.5(128*81 - 125*78) = ?
December 7, 2016

Math
.6/6 = ?
December 7, 2016

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 Z scores.
December 7, 2016

math
No table. Cannot copy and paste here.
December 6, 2016

math
agree
December 6, 2016

Math
Disagree, assuming each block is 1x1, that gives you 16 blocks. by the way, 1/4 ? 20%, 1/5 ? 25%
December 6, 2016

Math
.3 * 450 = ?
December 6, 2016

Science
80 * 4/5 = ?
December 6, 2016

Math
agree
December 5, 2016

attitude
As far as I know, "teapoi" is not one of the tutors. Even so, I apologize for any hateful post.
December 4, 2016

Maths
M = 3N (M+10) + (N+10) = 80 Substitute 3N for M in the second equation and solve for N. Insert that value into the first equation to solve for M. Check by putting both values into the second equation.
December 4, 2016

math
The answer is right in front of you. "Skittles 30%"
December 4, 2016

Math
He could have just 6 insects. Or he could have 3 spiders and 2 insects.
December 4, 2016

algebra
Pythagorean theorem for right triangle. a^2 + b^2 = c^2 3^2 + 4^2 = c^2 Solve for c.
December 4, 2016

Maths
How can it be 125 and 295. To sum to 99, each must be less than 99.
December 4, 2016

math
Possibilities out of 36 are 1,3 1,2 3,1 2,1 1,1 2,2 6/36 = ?
December 4, 2016

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