# 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.

**Business Psychology**

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 (?)**

What is your question?

**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**

Subtract estimate from exact answer.

**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**

What about it? Need to be more specific. https://www.google.com/search?client=safari&rls=en&q=athlete's+foot&ie=UTF-8&oe=UTF-8

**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.

**6 grade math**

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.