# Posts by PsyDAG

Total # Posts: 23,421

Math
98

math (?)
No Data

math
M = S + 20 M + S = 50 Substitute S+20 for M in the second equation and solve for M. Insert that value into the first equation to solve for S. Check by putting both values into the second equation.

Math
41 + 41/7 = Total cost Divide total cost by 2.

Statistics
H0: mean = 185 H1: mean ? 185

math
B = O + 1 12B + 20O = 108 Substitute O+1 for B in the second equation and solve for O. Insert that value into the first equation to solve for B. Check by putting both values into the second equation.

Math
540/45 = x/60 Solve for x.

Math
75, 93, 57, 39 Which one?

VU
(1-5/7)x = 500 Solve for x.

math
Z = (score-mean)/SD

Math
7.5/22 = x/13 Solve for x.

Math
7.5/22 = x/1313 Solve for x.

math
3x-2 = 91 Solve for x.

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.

Science/Biology/Health and Social Care
"If the body didn't have any energy," the organism would die.

Statistics (?)

Statistics
95% = mean ± Z(SD) Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (±.025) and its Z score. Insert data into above equation and solve.

math
I don't know how this is related to math. Although this is probably not much help for you, I would choose another site.

Math
Assuming that you meant 20 distance units: 20/5 = x/12 Solve for x.

Science
Glass, water, plants....

math
1000 + 900 + 800 + 700 + 600 + 500 + 400 = 4900

maths
Mode = most frequently occurring score.

Math
1?

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
3.9 + .15 = ?

Math
Outlier is most deviant score. mean = ?x/n

Math
No triangles. Cannot copy and paste here.

Math
D = 2R

statistics
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 use just that to determine SEdiff. Find table in the back of your statistics text labeled something like "areas under ...

Math
No figures. Cannot copy and paste here.

Math
Possibly this. .2x = 16 Calculate for x.

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

math
5554.52/20 = 27.73 per hour Multiply by the hours worked.

MATH HELP NEEDED prt 2
"start fraction x over 3 end fraction" is more easily written "x/3." 1. Letter answer conflicts with asterisks. 2. x/3 - 10 = -12 x/3 = -2 x = -6 Letter answer conflicts with asterisks. 3. Letter answer conflicts with asterisks. 4. Letter answer conflicts ...

science
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
.09x = 18 Solve for x.

Science (?)
More data needed.

Math
Subtract 2 from both sides, then divide by 5.

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/2 * 1/3 = ?

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 6 * 6 = ?

system of equations
Multiply first equation by 3. -12x - 3y = 18 12x - 2y = -8 Add the two equations. -5y = 10 Solve for y, then x.

Math
If there are three figures total. 2(7*3) + 4^2 = ?

Math
I am assuming that the square is one of the rectangles. 7 * 3 + 4^2 = ?

Math
4/180 = x/400 Solve for x.

MATH
(x+1) + 2x + (3x+1) = 30 Solve for x, then the values of each side.

Math
Cannot draw on these posts.

science
Since this is not my area of expertise, I searched Google under the key words "what makes us cry while chopping onions" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=what+makes+us+cry+while+cutting+onions&ie=UTF-8&oe=UTF-8 In the...

science (?)
It would help if you proofread your questions before you posted them. "worm infestation of certain autoimmune disorders...."?

Algebra
2M + 22

Math
Let x = causes and y = outcome. x = 4y x + y = 30 Substitute 4y 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.

Math

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 for Z in each of the situations.

Help needed
disagree

Math
2A - 3(A-6) = A Solve for A.

Math
Does "hence" mean from "10 years ago"? F = 2S F-10 = 4(S-10) Substitute 2S for F in the second equation and solve for S. Insert that value into the first equation to solve for F. Check by putting both values into the second equation.

Science (?)
No equations given.

AP Statistics - Chapter 6
1/6^10 * 5/6^10

biology
Instead of lungs, insects breathe with a network of tiny tubes called tracheae. Air enters the tubes through a row of holes along an insect's abdomen.

Science

math help pls
agree

MATHIN-HELPN!
a. 3 b. 1/2

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

Math
3/4x + 3.5 = 6.5 - 2/3x Solve for x.

Let x = length of longer pieces 2x + (x-15) = 156 Solve for x.

Algebra
Eight-sided? Assuming a 1 on one die, of the 8 sides of the other die, 1, 2, 3, 4 or 5 of the 8 ? 6. 5/8 = ?

Algebra
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 3/5 * (3-1)/(5-1) * (3-2)/(5-2) = ?

Math
50/4.80 = x/10.80 Solve for x.

math
15V + 9

Science
How far away is he standing?

cms (?)
What numbers?

Mathematics
What are the units for land measurement?

Math work
30 + 30 = 60 cards from cousin X - 1/4X - .2X - .5X = 60 Solve for X.

math
None are rounded to the nearest pound. However, unless there are typos, the closest answer would be C, since I estimate 21/3 = 7.

Statistics
SEm = SD/?n 25 = 300/?n Solve for n.

Math
M = 3S (M+10) + (S+10) = 76 Substitute 3S for M in the second equation and solve for S. Insert that value into the first equation to solve for M. Check by putting both values into the second equation.

Math check
Good estimates.

Math Statistics
SEm = SD/?n 25 = 100/n Solve for n.

Statistics
SEm = SD/?n 25 = 100/n Solve for n. Are you also anonymous? 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.

Stats
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 20/50 * (20-1)/(50-1) = ?

SCIENCE
No diagram. Cannot copy and paste here.

math
The longest one would be 5 by 1 (perimeter = 2L + 2W). Could also make 4 by 2 or 3 by 3.

maths
a) 800/20 + 1 b) 800/20 c) 20 * 21

Math
(12x-32)/4

maths
Think it again. 3 red, 4 black, 3 red, 4 black, 3 red, 4 black, 3 red, 4 black, 3 red, 4 black.

math
That means that the two side lengths are 2/3 perimeter, leaving 1/3 to be divided among the two widths.

Maximal area and dimensions of a window
Maximal area of rectangle is a square. 4w = 500 Solve for w.

math
Welcome

math
40,000 = 5000 + 2500m Solve for m.

math
3n - 26 > 10 Solve for n.

math
100(103/237) = ?

math
If you got one of each on the first three pulls, what do you think would happen on the fourth pull?

Math
one thousandths

Statistics
P(soph) = .25 P(non dorm soph) = (1-.60) If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

Math
Steve got 60 cards from his cousin. x - .25x - .20x - .5x = 60 Solve for x.

Biology
Not knowing how they would interact, I would say B.

Math
11 !/4 = 90/8 1 7/8 = 15/8 90/15 = ?

statistics (Partial)
Why would you have an odd number of socks of any color? 2. min = 2, max = 5 3. 7/19 4. 4/(19-1) = ?

Math
7/28 = ?

math
How would you know if a score is deviant or relatively expected?

maths
Multiply second equation by 2. 4x + 2y = -8 3x - 2y = 1 Add the two equations to solve for x. Insert x into one of the equations to solve for y.

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