# Posts by PsyDAG

Total # Posts: 23,969

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 each Z score.

Statistics
In "YOUR BAG" there is no mean. It weighs 36 ounces. If you are talking about each individual potato, 36/6 = 6 (b) Z = (mean1 - mean2)/standard error (SE) of difference between means SEdiff = ?(SEmean1^2 + SEmean2^2) SEm = SD/?n If only one SD is provided, you can ...

Math (?)
It would help if you proofread your questions before you posted them. "e cards are shu ed"? If each card of 30 were picked "at random," each card would have a probability of 1/30 of being picked.

math
n/d n = d - 3 n = d - 3 + 3 = d 1/4, 2/5, 3/6 etc.

math
-18.9x - 4.5y

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

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

Algebra HELP
I'm not sure, but how about a distribution with only one observation?

Math
pages 1-9 = 9 digits pages 10-99 = 2 * 89 = 178 digits 228 - 187 = 41 digits remaining 9 + 89 + 41/3 = ? pages It doesn't come out to a whole number of pages.

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. e.g., 4^5, 3^4, etc.

Math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 1/11 * 3/9 = 3/99 = 1/33

Algebra 2
f(-3) = |2(-3)-1| - 5 = |-7|-5 = 7-5 = 2 "|-7|" = absolute value of 7.

Science
Radial symmetry can divide into similar halves regardless of orientation of division, e.g., starfish. Bilateral symmetry divides into two symmetrical sides only when divided from head to tail.

Math
2 * 12 = 24 1.75 * 12 = 21

ELA (?)
The author of what?

Math (?)
-6 ? 13 + 5 There is no X in this equation.

Science

Science (?)
We do not have pages 70-74.

Math Help
area = base * height 12 m^2 = base * height 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. Do you know the value of the base?

math
SEm = SD/?n = 3/?100 = 3/10 = .3 sample mean = 13.6 ± .3 (68% of the time)

Math
Please put in the parentheses "()", slash marks "/" to indicate a fraction, and commas "," to clarify your question.

Math
Cannot sketch here.

science
There is no a, but XX gives you a female.

Biology
It doesn't remove the bacteria, it just kills them. BOILING AND PASTEURIZATION. Boiling water kills or inactivates viruses, bacteria, protozoa and other pathogens by using heat to damage structural components and disrupt essential life processes (e.g. denature proteins...

math
2A + C = 8 A + 3C = 9 Multiply second equation by 2. 2A + 6C = 18 Subtract first equation from revised second. 5C = 10 Work it from there.

math
2x^2(y^3)

Psychology
Right!

Psychology

Stat 214
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
.45 ± .05 < ?

consumer math
795 + (.02)10,560 = earnings What percent goes to medicare? (.0145?) If so, multiply that by earnings.

Statistics
The score is .62 standard deviations below the mean. 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.

Math
51 is the ninth and tenth scores out of 20. 9.5/20 = ?

math
812/2 = 406 children 406 + 96 = 502 women 812 - 502 = ?

anatomy
There are 46 chromosomes in each cell of a human body (excluding ovum and sperm).

Statistics of Psychology(?)
I have no idea what EX is.

Math
x < 9.02 or x > 9.48 because |x ? 9.25| > 0.23

MATH
6, 18/24 = 3/4 Please do not use all capitals. Online it is like SHOUTING. Not only is it rude, but it is harder to understand. Thank you.

math
Let x = number in class. x - 1/4x - 1/3x - 2/5x = 3 Solve for x.

Science (?)

Math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. A, 400 + 32 = 432 I'll let you do the calculations

math

math
First, Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. V = x * x * (x+4) You are adding instead of multiplying. V = x^2 * (x+4) = x^3 + 4x^2

Math
50% in a normal distribution = median = mean Z = (score-mean)/SD Look in the back of your statistics textbook for a table called something like “area under normal distribution” to find the proportion/probability (.025) and its Z score. Insert into equation above and ...

Math
Yes

Math
500 + 2x = 2800 Solve for x.

Mathematics
Let x = income 1/8x = 2400 x = 19,200 (1-5/8) * 19,200 = ?

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

Project Mnagment
Since this is not my area of expertise, I searched Google under the key words "qualitative vs quantitative risk analysis" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=qualitative+vs+quantitative+risk+analysis&ie=UTF-8&oe=UTF-8 ...

Algebra
mean = ?x/n 182 = (183+178+174+185+x)/5 Solve for x.

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

Science
Goggle using key words, "laminar structure in cortex".

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

math
Even with 5 added, with the denominator being 20 more, the result cannot be a whole number. Typos?

maths
We cannot collect your classmates marks.

Science
Since this is not my area of expertise, I searched Google under the key words "genetic diversity sexual reproduction" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=genetic+diversity+sexual+reproduction&ie=UTF-8&oe=UTF-8 In the ...

Linden Math
It would help if you proofread your questions before you posted them. Instead of "2!/2", I assume you mean 21.2. I also assume that Ted wants a share. 21.2/6 = ?

prealgebra
1,000-320 = (2*20)x Solve for x.

Maths
I assume you have a typo somewhere, because the r's cancel each other out. -5r+6 ? -5r-10

math(?)
What translations are there?

Algebra 1
(65+67+67+93+6x)/10 = 70 (65+67+67+93+6x)/10 = 79 Solve for x in each case.

math
If you multiply 6x+5 time x-1, you will see that you are not doing it right. You need to split the 6 into its factors and pair the largest one with -5. I could give you the complete answer, but it is better that you find it for your self.

math
Here is the way to set up that problem. 171/19 = x/11 Then do what Kat said.

math
Online "^" is used to indicate an exponent, e.g., x^2 = x squared. The one without an exponent.

Math
(1-.25)x = 339 Solve for x.

Math
Assuming the 4 is divided equally among the sons, 2/9 * 108 = ?

Math
6 and 6

math
15.5/.04 = ?

Math (?)

Math
Those are specific examples. They want a general rule. 2n + 2n = 4n (2n+1) + (2n+1) = ? (2n+1) + 2n = ?

math
x/3 = 50 Solve for x.

Math
C/4 = G C = 36 + G C = 36 + C/4 .75C = 36 Solve for C.

Math
Solve last equation, get rid of the first 1, and convert to percentage.

Math
1.1 * 50,000 = 55,000 1.08 * 55,000 = 59,400 59,400/50,000 = ?

math
Right

Stats
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities and their Z scores. Z = (score-mean)/SD

Math (oops)
I goofed. If median is 5 and range is 5, scores would range from 3 to 7. False.

Math
not enough info

MATH(?)

Math (?)
Lacking data.

Algebra (?)
You don't show your work or all of the data. What statistics are in Act Two? With all that missing, we cannot respond.

Math
Mean = (94.1-15)/60 Since every score is reduced by the same amount, the SD remains the same. SD = 24.23/60

Math
4b + 5p = 32 5b + 4p = 31 Multiply first equation by 4 and second by 5. 16b + 20p = 128 25b + 20p = 155 Subtract first from second and solve for b.

Science(?)
Question unclear. Possibly rounding to the first 3? 3.365*10^5 = 300,000

math help!!

Science
Why is it per second squared? Distance = rate * time 64 = (8-3)/1000 * time Solve for time.

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
Above ground would be positive, and below ground would be negative. For example the third level below ground would be -3.

Geometry (?)
Unclear. How can the diameter be 40mm and 6.8 cm?

Math (?)
No graph. Cannot copy and paste here.

biology
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.

orgo

English
These are my suggestions. 9. I delivered the package to Diane's house, because it was mistakenly delivered to my house. 10. I’m not sure which schedule to follow. Since it's a floating holiday, not everyone will come. 11. Before I go to sleep, I set my alarm. I ...

Maths
M - 27 = S M - 4 = W M + W + S = 116 Substitute M-27 and M-4 for S and W respectively in the third equation and solve for M. Insert that value into the first equation to solve for S.

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

Science