# Posts by PsyDAG

Total # Posts: 23,378

math
7x−2y=15 x+y=6 Multiply second equation by two and then add the equations.

Drivers ED check my answers
It has been over a half-century since I got my license, so I can't answer all the questions. 2. agree 3. DK 4, 5, 7. Agree 8. Disagree 9. DK 10. agree 11. DK 12. agree 13. DK 14. disagree 15. All of them 16. disagree 17, 18. agree 19. "IPDE"? 20. DK 21, 22, 23, ...

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

math
Does "them" apply to dozens or individual bananas?

math
1.06x = 75 Solve for x.

math
decimal of .25?

Math
To figure the third side, use Pythagorean theorem. 5^2 + 12^2 = h^2 This gives you the perimeter of the triangle. However, since they come in a "variety of lengths", you need more information. Also how high is the stand? What about the opening to sell the products?

Math
800 = π (r^2) h Decide on either the height or radius and solve for the other.

Math
What is your question?

English
I'll point out problems, and let you correct them. Better to use left and right rather than "westward" or "eastward," since you don't know what direction the person is facing. Toward which armpit? Does the person ever return to original standing ...

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

Probability
P(1 or 4 or 5 or 6) Either-or probabilities are found by adding the individual probabilities. That is how Ms Sue got the answer.

Probability
If "circle is yellow," there is no probability of getting a red number.

algebra
What are your choices? It would be essentially a straight line going from lower left to upper right.

math
Cannot make probability tree on these posts.

Pre alg
disagree, what is "-2x+5x"?

Literature (?)
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. What book/story does this relate to?

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

my son's math help please
It doesn't matter how many slices. 2/3 of a cake is larger than 1/3 of a same-sized cake.

English
Don't know the story, but Holmes is noted for his careful and scientific solutions.

Math
5280 * .2 = ?

Maths
It would help if you proofread your questions before you posted them. From your data, it could be 863, 881, 845, 827 or 809.

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 "...

Math
Average = mean = sum of scores/number of scores I'll let you do the calculations.

ALGEBRA
It would help if you proofread your questions before you posted them. Where did you get 3/11? From your data, I would get 1/5(letters) * 1/2(coin) = 1/10

pre algebra
agree

algebra (?)
We cannot see the histograms. You cannot copy and paste here.

Geometry
Circumference = 2πr

algebra
10.5x = 7.5x + 30 Solve for x, then insert into one of the two equations to find y.

math
1. disagree, when dividing, exponents are subtracted. 2. disagree, when dividing, exponents are subtracted. 3. disagree, what is 4^-2? 4. disagree, anything to the Zero power = 1.

math
What are your answers? 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. When multiplying/dividing, exponents are added/subtracted respectively.

Math
Can get 7 with 4,3 or 3,4 or 5,2 or 2,5 or 6,1 or 1,6 out of 36 possibilities = 6/36 Use the same logic for above or below 7.

Math
7.5 gallons/cubic foot Convert to feet. V = 18 * 8 * 12 = 1.5 * 2/3 * ! = ?

Maths
M = 3D M+5 = 2.5(D+5) Substitute 3D for M in the second equation and solve for D. Insert that value into the first equation to solve for M. Check by putting both values into the second equation.

Math
8/44 = ?

Math
5/12x = 25 Solve for x. Subtract 25 from x. He will not have any chickens after 3 months.

science (?)
What plants? Biological categories? https://www.google.com/search?client=safari&rls=en&q=plant+classification+chart&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=4y5DV43PBOSD8QfJ8YbYBg

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

Math
Or you could try it this way. P-4 = A 6A = 4P Substitute P-4 for A in the second equation and solve for P. However, something seems askew here. Typos?

Math
6A = 4P A = 4/6P = 1/3P P = A + 4 Substitute P/3 for A in the third equation and solve for P.

math
N = 6E

maths
Cannot graph here.

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

Biology
What are your answers? 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
1543 = 16t^2 Divide both sides by 16 and then get square root.

Math
To get product (one negative) of -36, can have 18,2 or 9,4 or 3,12. 12 - (-3) = 15

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

math
36,336 and 63,363

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

math
D = L - 28 1/3L = 4/5D Substitute L-28 for D in the second equation and solve for L.

Math
I didn't even know there were "12th grade admission exams" when I was teaching. The content is likely to vary with the school district.

Statistics
Z = (score-mean)/SD A,B. 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 scores. Multiply by 100. C. Use same table to find Z for .02. Insert in above equation...

find the number
What is your answer? 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.

Algebra
I will not even get into the math. It would help if you proofread your questions before you posted them. First, you say "summarize it in one-two paragraphs," but you have four. "each country’s payroll" More than one country? Your lack of comma use is ...

Business Communication
Are company databases external?

Business Communication
Even with the errors in capitalization and punctuation, I find it readable, a. However, I agree with Writeacher that your need to avoid developing sloppy habits for business communications.

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 1. What is x*x? 2. What is -3m*8? 3. Agree. 4. What is 5b*6B? 5b*10?

math
1. Disagree. 2. disagree. 3. disagree. 4. disagree.

Math (?)
No picture. You cannot copy and paste here.

Algebra(?)
Need more data. Typos? ABCD?

Pre algebra
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/2 * 1/6 = ?

Geometry
Pythagorean Theorem a^2 + b^2 = L^2 24^2 + 10^2 = L^2

Math/ Ratios (oooops)
I'm sorry. That was past tense, "did." If so, add A and H.

Math/ Ratios
A = H (A-23)/(H-7) = 3/4 Substitute H for A in the second equation and solve for H. Insert that value into the first equation to solve for A. Add (A-23) and (H-7).

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 2*2*2 ≠ 12 However, unless you have more typos, I get 5 too.

atlantic high
Pythagorean Theorem a^2 + b^2 = c^2 a^2 + 4^2 = 8.5^2 Solve for a.

Math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 4(2/4) = 2 2*4 = ?

MAth
Add 3.6 to both sides and divide by .9 to solve for x.

science
What are your choices? Digest? Eat? Consume?

math
1.06x = 42.40 I get 40 too.

statistics
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.

statistics (?)
What does X stand for? If x is a score: Z = (score-mean)/SD

Math
P = 2L + 2W

Physical Education: Just checkin' if they're right
Free style? Agree with 300.

maths
C = 2πr = 2*3.14*(30/2) (C * 33.3)/100 = m traveled

Math
R = 25 - W 10R - 2W = 202 Substitute 25-W for R in the second equation and solve for W. Insert that value into the first equation to solve for R. Check by putting both values into the second equation.

Math (check my work)
Complementary means they add up to 90 degrees. (x+13) + (2x+23) = 90

MATH PLZ HELP
7. Disagree. 8. If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 4/10 * 2/10 = ? 9. Correct 10. P(heads) = 1/2 P(<5) = P(4 or 3 or 2 or 1) Either-or probabilities are found ...

math
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. assuming you want price per gallon: 10.75 * 12/128 = 1.008 gallon = \$15.65, but \$15.53 is the closest.

math
Either-or probabilities are found by adding the individual probabilities. P(<4) = P(3 or 2 or 1) = 1/6 + 1/6 + 1/6 = ?

Stuck in a Question
Does the definition sound uncertain? Critical?

algebra II
Q = 120 - D .25Q + .10D = 19.05 Substitute 120-D for Q in the second equation and solve for D. Insert that value into the first equation to solve for Q. Check by putting both values into the second equation.

Languge arts (?)
What is a "tang town"?

math !
Welcome

math !
1) An independent variable is the potential stimulus or cause, usually directly manipulated by the experimenter, so it could also be called a manipulative variable. A dependent variable is the response or measure of results. 2) not an inequality. 60/15 = 4 3) anything < 14 ...

math
75/1.5 = 50 mph 325/50 = ?

geometry
the first two are correct, but I can't answer the following because the figures are not given.

Artificial Intelligence
If B is pardoned, either A or C will be executed, 1 out of 2.

Science (?)
What are your choices? Minerals?

math
It would help if you proofread your questions before you posted them. "1 cm : 0.5 cm"?

Language arts
No need to correct.

Math (?)
No diagram.

Math
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Received placebo (1-.80) = .20 Showed improvement (1-.62) = .38

maths geometry (?)
No angle shown. Cannot copy and paste here.

Math
How can you "toss three coins and get one head and one tail"?

math
Cannot graph here. I will use substitution. l = k + 150 l + k = 900 Substitute k+150 for l in the second equation and solve for k. Insert that value into the first equation to solve for l. Check by putting both values into the second equation.

Math
V (round) = π(r^2)h V Rectangular = 6*9*2 A (round-bottom) = 2πrh + πr^2 A (rect.-bottom) = 6*9 + 2*2*9 + 2*2*6

Spanish
1. right 2. wrong 3. right 4. wrong 5. right 6. wrong 7. DK 8. DK 9. right

Math
V = π(r^2)h *3 = ?

math
To compare more easily, change to decimals. 1/4, 1/3, 2/3, 5/7 = .25, .33, .67, .71

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