# Posts by PsyDAG

Total # Posts: 23,471

math
It would help if you proofread your questions before you posted them. Level of significance? 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/...

stats
Grade points times credit hours divided by total credit hours. [(5*4) + (4*3) + (3*1) + (2*3) + (1*4)]/15 = ?

science

Math
Cannot draw diagrams here.

maths
q = a + 15 3a + 2q = 3 1/8 Substitute a+15 for q in the second equation and solve for a.

Math
You are welcome.

Math
Yes

Math
1/8

Math
For every 3 parts of blue, you need 4 parts of yellow.

Math
Area = 1/2 height * base 48 = 1/2 height * 12 Solve for height.

math
Circumference = π d Convert to cm. Area = 10 circumference

Statistics
Variable = number of children per family Can a family have a half of a child? Possible values for a family = 1, 2, 3, 4....

Math
93

algebra
1.4x + .25 = 1.99 Solve for x.

math
j = 8/5m j - m = 390 Substitute 8/5m for j in the second equation and solve for m. Insert that value into the first equation to solve for j. Check by putting both values into the second equation.

Math HELP!
3/4 > -5/6 -1 3/4 < 3/4 2 3/4 > 2 4/6

Science (?)
Need more data. 100,000 km per what time unit? Sometimes Earth is close to Mars, when it's making a pass, and other times it's far away, at the other side of the track. The minimum distance from the Earth to Mars is about 54.6 million kilometers. The farthest apart ...

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

Statistics (?)
Lack of data. What is your question? Assuming n stands for number in sample and S indicates standard deviation, it would be nice to know the mean for each group.

biology

MATH
Es mejor escribir en inglés.

MATH(?)
No numeros aqui. No puede copia o goma aqui.

Psychology
How is this psychology?

Math
At \$.01 difference for each pencil, you need 200.

math
60 + 10m

algebra
420,000

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

maths
7x = 4x + 9 Solve for x.

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 5(4+3) * 6 = 210

math
W = 2L - 8 W * L = 172 Substitute 2L-8 for W in the second equation and solve for L. Insert that value into the first equation to solve for W. Check by putting both values into the second equation. Then use Pythagorean theorem. W^2 + L^2 = diagonal^2

Math
5 and -5, the magnitude of a real number without regard to its sign.

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. See later post.

Math
The same. High minus low still the same.

math (?)

math
F = M - 240 M - 260 = 2F Substitute M-240 for F in the second equation and solve for M.

algebra (?)

Maths
(1-4/9)x = 45 Solve for x, then subtract 45 from that.

Math
N + 3

math
Radius bisects square, so use Pythagorean theorem. x^2 + x^2 = 2x^2 = 12^2

math
12^2

math
Use Pythagorean Theorem. s^2 + s^2 = 12^@

math
Pythagorean theorem again 12^2 + 9^2 = d^2

math (?)
Which two corners?

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

Science
1-3 Right 4. Rejected 5. Lack of thiamine causes beriberi. New set of chickens fed whole grain or polished rice.

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. Cannot draw diagrams on these posts.

English (?)
equals what?

Math
Right, x = 18 mean = ∑x/n Therefore mean * N = ∑x 14 * 5 = 70 Which 5 scores will = 70?

Math
Subtract 8x from both sides, then divide both sides by -4.

Math
You do not need to use all four operations ("at most"). 33*3 + 3/3 = 100

Math
Assuming that 10.5 is the height of the pictures, that is what I would do.

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
Right

Algebra Age
J = 3A J+15 = 2(A+15) Substitute 3A for J in the second equation and solve for A. Insert that value into the first equation to solve for J. Check by putting both values into the second equation.

Math
I will do two for you to show the process. 2) 97/100 3) 36/2

Math (?)

math
Cannot graph on these posts.

Math
40/7 = x/20 Solve for x.

Math
Although each chosen color was the most likely, the majority of the time (55%) they will be wrong.

science
Sexual reproduction involves a chance combination of half the chromosomes from each parent. It is impossible to tell how it effects the chances for survival for AN organism, but with severe environmental changes, it increases the chances that some members of the species will ...

english speech
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 help asap
You need to post the specific problem, so we can give an adequate response.

Math (?)
It would help if you proofread your questions before you posted them. Second car speed?

Math
10/3 = x/.5 Solve for x.

Math
In the two hours, first car has traveled 70 miles. 55x = 70 + 35x Solve for x. 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
54/18 = 3

Science
Every question answered brings up new questions. Can you think of a better way than the inquiry process?

Science
Since this is not my area of expertise, I searched Google under the key words "How Can Nitrogen Be Obtained From Ammonia Gas? " to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=How+Can+Nitrogen+Be+Obtained+From+Ammonia+Gas%3F&ie=UTF...

Maths
It would help if you proofread your questions before you posted them. You are missing a number between - and /.

statistics
5 * 10 * 6 * 8 = ?

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.

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

Math (?)
What graphs? Cannot copy and paste here.

Math
one

math
431,205,601

Algebra
22.50 = (1-.25)p Solve for p.

Science
...or predator.

Science
It matches the background, so they are less likely to be detected as prey.

Math
Just think of Arctic Circle, where the sun is up 24 hours a day during the summer.

Math
Correlation does not necessarily mean causation.

Math
Convert to decimals to clarify. .6 + .7 = 1.3 lbs 1.3/.8 = ?

Geometry
Have no idea about length of line. Cannot copy and paste here.

math
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. 8 + 12p ≤ 140 Solve for p.

stats
Do you know the 68-95-99.7 rule? Approximately 68% of scores in normal distribution are within one standard deviation (34% on each side of the mean), 95% within 2 SD, and 99.7% within 3 SD. Z = (score-mean)/SD You can also find table in the back of your statistics text labeled...

profit and loss (?)

Since this is not my area of expertise, I searched Google under the key words "what functions do individual cells perform that are similar to the functions of our bodies?" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=what+...

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.

math
Assuming all rows have the same number of seats: 600/36 = 16.67 = ?

MATH
The one boy could be born first, second, third or last, 4 ways. The rest will be girls. Cannot do a tree diagram here.

Statistics
P(65+) = .2 P(<65) = .98 P(2<65 of 6) = .98^2 * .2^4 = ? Cannot construct probability distribution here.

Math
Specific weight is weight per unit volume. 540/(5)^3 = ? g/cc

Algebra
A = C + 4 9A + 5C = 76 Substitute C+4 for A in the second equation and solve for C. Insert that value into the first equation to solve for A. Check by putting both values into the second equation.

math
mean = ∑x/n Since you just want change you can ignore direction. Use absolute values. Disagree

math
Have more confidence in yourself.

math

math
12 - 3 + 10 - 15 = ?

algebra 1
-3*4 = -12 A negative times/divided by a negative is positive. -12/-6 = 2

algebra 1
disagree

math
123,456

algebra 1
agree

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