Saturday
December 10, 2016

Posts by PsyDAG

Total # Posts: 22,784

statistics
The variable is number of children, which is discrete. (You can't have half of a child, pregnancy does not count.) Values are 0 to ??
November 1, 2016

Math
It would help if you proofread your questions before you posted them. "5 ten times greater"?
November 1, 2016

math (?)
Table not available.
November 1, 2016

Math
10 + 7*1.5 ? 20.5
November 1, 2016

algebra
P = 4x for small square P = 4(x+2) for large square 4x+2 = 2(4x) Solve for x then x+2.
November 1, 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 (.99) and its Z score. Insert data into above equation and solve for score.
November 1, 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.
November 1, 2016

math (?)
Cannot decipher your data.
November 1, 2016

Statistics
a) yes b) If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 2/4 * (2-1)/(4-1) = ? c) 2/4 * 2/(4-1) = ?
November 1, 2016

Algebra
The vertical bars indicate absolute value, regardless of sign. 16/7
October 31, 2016

probability and Stats
SEm = SD/?n I could only find it from b.
October 31, 2016

Maths
Q1 — 1/6 Q2 — DK, more data needed, but would guess very unlikely Q3 — DK, more data needed, what was their past performance?
October 31, 2016

Math
Let x = ten and y = 20 cent coins x = y+12 .10x + .20y = 5.40 Substitute y+12 for x in the second equation and solve for y. Insert that value into the first equation to solve for x. Check by putting both values into the second equation.
October 31, 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.
October 31, 2016

maths(?)
Clarify question.
October 31, 2016

math
L = W + 11 2L + 2W = 106 Substitute W+11 for L in the second equation and solve for W. Insert that value into the first equation to solve for L. Check by putting both values into the second equation.
October 30, 2016

Statistics
It would be okay to compare the Z scores, but not the raw scores, from each test. In order to do that, you would have to know the mean and standard deviation of each test, assuming they were all normally distributed.
October 30, 2016

math
The empirical rule states that for a normal distribution, nearly all of the data will fall within three standard deviations of the mean. The empirical rule can be broken down into three parts: 68% of data falls within the first standard deviation from the mean. 95% fall within...
October 30, 2016

Statistics
(a) yes (b) If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/6 * 1/6 = ? (c) same odds (d) Either-or probabilities are found by adding the individual probabilities.
October 30, 2016

Statistics
Agree with all answers
October 30, 2016

math
D = 6M (D + 12) = 2(M + 12) Substitute 6M for D in the second equation and solve for D. Insert that value into the first equation to solve for M. Check by putting both values into the second equation.
October 30, 2016

Maths
(500-5)/500 = ?
October 30, 2016

Maths
2/3x = 1/4x + 500 Solve for x.
October 30, 2016

Science
agree
October 29, 2016

Discrete Math
a) #red/total = ? b) If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. c) Either-or probabilities are found by adding the individual probabilities. d) (1-c)^5 e) 6/38 * (1-6/38) = ?
October 29, 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 later post.
October 29, 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 related to the Z score. Multiply by 1100.
October 29, 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 related to the Z score. Multiply by 1900.
October 29, 2016

math
I will start you out. a) There are 36 possibilities. 6,2; 2,6; 3,5; 5,3 are the only combinations that = 8. b) P(even) = 3/6 = 1/2 If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual ...
October 28, 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) 3/6 * 3/6 = ? b) 1/6 * 1/2 = ? c) 3/6 * 3/6 = ?
October 28, 2016

Math
Sí, sí, c.
October 28, 2016

math
(a) 1/4 If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. (b) 1/4 * 1/(4-1) = ?
October 28, 2016

math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 4/12 * (4-1)/(12-1) = ?
October 28, 2016

Math
I don't know why you have the second step. 2s < $25 s < $12.50
October 28, 2016

Math
(24,710.40-22,464)/22,464 = % increase 1.(% increase) * 24,710.40 = ?
October 28, 2016

math
(-5)(-2) = 10
October 28, 2016

math
It would help if you proofread your questions before you posted them. [34+?] Also, online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown.
October 28, 2016

Algebra
$6.50h = m h = 4.25
October 28, 2016

math
(1/12)x = 5/8 2/24x = 15/24 2x = 15
October 28, 2016

Spanish
Sorry, pressed wrong button. Agree, second one is incorrect Third is correct, but "yo" is redundant.
October 27, 2016

Spanish
No, trabajadora is a noun, not an adjective.
October 27, 2016

Math
Since this is not my area of expertise, I searched Google under the key words "Compare partial products and regrouping" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=Compare+partial+products+and+regrouping&ie=UTF-8&oe=UTF-8 In ...
October 27, 2016

math
W = 175/D W-5 = 4(D-5) Substitute 175/D for W in the second equation and solve for W. Insert that value into the first equation to solve for D. Check by putting both values into the second equation.
October 27, 2016

Math (?)
Cannot post flow chart. Even so, need to let us know the three numbers.
October 27, 2016

Algebra
agree
October 27, 2016

STATISTICS
(a) 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 that relates to the Z score. (b,c) Reverse process from proportion to Z score. Insert into above ...
October 27, 2016

science
True
October 27, 2016

botany?
Since this is not my area of expertise, I searched Google under the key words "biggest desert plant" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=%22biggest+desert+plant%22&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
October 27, 2016

algebra
20 + .40(x-60) = C Insert cost and solve for minutes(x).
October 26, 2016

algebra
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.
October 26, 2016

Spanish
Don't have post here.
October 26, 2016

Science HELP!!
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.
October 26, 2016

algebra
If t = $6 and s = $3, and you buy 5 notebooks 3t + 2s ≤ $24 Do you want > 5 notebooks?
October 25, 2016

Science
Which science? Species?
October 25, 2016

Ela
Unless a specific problem is posted, we cannot help you.
October 25, 2016

Drivers ED
agree
October 25, 2016

Science
traction?
October 25, 2016

algebra
-15 + 5x + 4 = 5q - 11 5x = 5q - 22 x = q - 22/5 I assume this is what you wanted to know, but I am not sure, since you did not ask a question.
October 25, 2016

Math (?)
Lack data. Why do you multiply by 4?
October 25, 2016

maths
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.
October 24, 2016

Science Biology
Each mutation has an equal probability of occurring.
October 24, 2016

Math
1. x > 17 2. 3x ≤ 21 x ≤ 7 3. 5a < 20 a < 4 2t+8 ≥ -4t-4 6t ≥ -12 t ≥ -2
October 24, 2016

Math
19
October 24, 2016

Statistics (?)
It would help if you proofread your questions before you posted them. No values given. 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 ...
October 24, 2016

science
D = r * t D = 65 * 7/3 = 151 2/3 151 2/3 = 65t 151 2/3 = 43t Compare the two.
October 24, 2016

Math
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Move decimal place 5 points to the right. 1.42*10^5 = 142,000
October 23, 2016

psy/315 (?)
No table.
October 23, 2016

value
From your data: x + 9 = 2 1/4x = 2.25x Solve for x. However, this does not solve to be a whole number. Typos?
October 23, 2016

Math
Assuming that the person has to completely refill an empty tank: 35d + 19.95d + 19*3.40 = b
October 22, 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.
October 22, 2016

Science
Since this is not my area of expertise, I searched Google under the key words "why current pass through the water " to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=why+current+pass+through+the+water&ie=UTF-8&oe=UTF-8 In the future...
October 22, 2016

Statistics
-1Z < µ < +1Z
October 21, 2016

Math
Since the increase for any two years is never greater than 100, what would you say?
October 21, 2016

Biology
the sex cells, sperm or egg.
October 21, 2016

Algebra
Use Pythagorean theorem. Triangles needed for what? For one diagonal, only gives two triangles.
October 21, 2016

Health!
I would suspect that it is close to zero, since their blame and aggression is typically expressed toward others. https://www.google.com/search?client=safari&rls=en&q=anitsoical+personality+disorder+suicide&ie=UTF-8&oe=UTF-8
October 21, 2016

science
It would depend on the type of statistics. https://www.google.com/search?client=safari&rls=en&q=statistical+diagrams&ie=UTF-8&oe=UTF-8
October 21, 2016

statistics (?)
It would help if you proofread your questions before you posted them. You cannot copy and paste here. What do you want to find?
October 20, 2016

mathematics
.9x = 27 Solve for x.
October 20, 2016

Science, Biology
Do they eat the same food? If so, they would compete for the same source. However, the effect would depend on how plentiful the food source was.
October 20, 2016

College algebra
-2.4+(5.2) = 5.2-2.4 = 2.8
October 20, 2016

Math (?)
It would help if you proofread your questions before you posted them. Lacking data.
October 20, 2016

Math
2 Twelve packs (24) = 7.98 Case (24) = 6.88 Compare.
October 20, 2016

Math
3.99 * 2 = 7.98
October 20, 2016

Math
8/3 < 12/4
October 20, 2016

Algebra
-(3x-2y) -(5x-4y) = -3x+2y-5x+4y = 6y-8x
October 20, 2016

math
Diameter = 2 cm, so 2 cm width would only get 5 disks. Thus 4cm is minimum, but will get 10 disks.
October 20, 2016

math
Cannot diagram here. 36/4 = 9
October 20, 2016

science
agree
October 19, 2016

Math
If you change each answer to decimals, the answer will become clear. For example: .83 < .67
October 19, 2016

math
Distance traveled to and distance from a particular goal from a particular starting point (negative relationship).
October 18, 2016

Math (?)
Lacking data.
October 18, 2016

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 12/13 * (12-1)/(13-1) = ? (Assuming that the person does not want a double portion of any topping)
October 18, 2016

8th grade 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. When multiplying/dividing, exponents are added/subtracted respectively. 1.4*10^9/1.28*10^4...
October 18, 2016

psychology
I would go with A.
October 18, 2016

Algebra
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. When multiplying/dividing, exponents are added/subtracted respectively. (6*10^-5)(3*10^4...
October 17, 2016

Math
√1156 = 34 4 * 34 = ?
October 17, 2016

Statistics
It would help if you proofread your questions before you posted them. Values not given.
October 16, 2016

math
(1-.28)x = 126 Solve for x.
October 16, 2016

algebra
That ± (plus or minus) 25 ft. 25 * .01 = .25 ft 24.75 - 25.25 ft
October 13, 2016

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