# Posts by PsyDAG

Total # Posts: 23,828

attitude
As far as I know, "teapoi" is not one of the tutors. Even so, I apologize for any hateful post.

Maths
M = 3N (M+10) + (N+10) = 80 Substitute 3N for M in the second equation and solve for N. Insert that value into the first equation to solve for M. Check by putting both values into the second equation.

math
The answer is right in front of you. "Skittles 30%"

Math
He could have just 6 insects. Or he could have 3 spiders and 2 insects.

algebra
Pythagorean theorem for right triangle. a^2 + b^2 = c^2 3^2 + 4^2 = c^2 Solve for c.

Maths
How can it be 125 and 295. To sum to 99, each must be less than 99.

math
Possibilities out of 36 are 1,3 1,2 3,1 2,1 1,1 2,2 6/36 = ?

Math
.6(150) + .75(200) + 130 = ?

Math
.6(150) + .75(200) + 130 = ?

Mathematics
1/70 = x/2100 Solve for x.

Math
27.30/17 = x/30 Solve for x.

MATH
No following given. You cannot copy and paste here.

biology

math
No table.

Math
(1-1/4)x + 10*20 = 300 Solve for x.

Math
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 between the two Z scores.

Math
Area = width * height 35 = 5 * ?

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