# Posts by PsyDAG

Total # Posts: 23,426

**Math**

Either-or probabilities are found by adding the individual probabilities. P(A or B)= P(A) + P(B) = .03 + P(B) = .07 P(B) = .04 Typos?

**math**

10 liters = 1 cubic centimeter 80*60*50 = ? cubic centimenters

**maths**

Since this is not my area of expertise, I searched Google under the key words "How to draw functions in same set of axes" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=How+to+draw+functions+in+same+set+of+axes&ie=UTF-8&oe=UTF-8&...

**MATH (?)**

First, please do not use all capitals. Online it is like SHOUTING. Not only is it rude, but it is harder to understand. Thank you. Between the chord and what?

**science (?)**

Lack data.

**statistics**

Z = (score-mean)/SD Use the Z table.

**Algebra**

Why do YOU think this? Might it be helpful in your later life?

**math**

The current value is $200. The cumulative value = $200 * 15 * 12

**Science**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. 4MV = 4*MV

**Mathematics (?)**

No picture. Ramp of 97.4 degrees is almost right angle. Typo?

**algebra 1**

agree

**Algebra**

Can a picture frame be -20?

**Vocabulary**

Disagree

**Vocabulary**

agree

**CHECK my answers for DRIVERS ED**

1, 2, 3, 4, 5, 9. agree 6. what is your answer? 7, 8. DK

**math**

Either-or probabilities are found by adding the individual probabilities.

**maths (?)**

Do you mean X^3 = 36.13 * 10^-24?

**Math**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. Second step x4/36 = (2/3)/36

**math (?)**

lack data

**Math**

8 for $5 = 4 for $2.50 That is 100% profit on those 4 oranges, assuming that the other 4 oranges are not just thrown in the garbage.

**Maths**

L = 2W+3 2L + 2W = 150 Substitute 2W+3 for L in the second equation and solve for W.

**math**

48 hours = 2 days What is Ro?

**math**

If inversely proportional, if x is increased by 50%, y should decrease by 50%.

**Math**

State you specific problem(s) and we will do our best to help.

**Math (?)**

How many green tiles are there?

**Math (?)**

No mosaic shown. Cannot copy and paste here.

**Math**

Area of circle = π(r^2)

**Math (?)**

What following?

**maths (?)**

Does "total area" include the top and bottom or just the sides? Painted area = 2*80*48

**Stats**

disagree

**math (?)**

What is your question?

**Biology**

Use the Punnett square. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl Remember that it is a recessive gene.

**Math word (?)**

Does general = student?

**help science**

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

**Biology (?)**

Do not understand what you are asking.

**Biology**

https://www.google.com/search?client=safari&rls=en&q=piunnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl

**Bio**

But only the female can be a "carrier," having the sex-linked trait in the genotype, but not in the phenotype.

**Bio**

Sex-linked traits are X-linked traits. What does that tell you?

**Bio**

DNA makes up the code for all living things.

**math**

Find the mean first = sum of scores/number of scores Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance. I'll let you do the calculations.

**SCIENCE PLZZ HELP!!!**

Read bobpursley's answer again... very carefully.

**physical science (?)**

No above mentioned.

**Math**

Do you want the discounted price? If so: (1-.55)$16.99 = ?

**Math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. .65^4 = ?

**math**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. When multiplying/dividing, exponents are added/subtracted respectively. 4^3 * 4^12 ≠ 4^36 (wrong) x^11/x^4 = x^7 (right)

**math**

Right

**Biology**

What various types of microscopes would you be using?

**Math**

1. Agree 2. disagree 6, 7, 10, 13. agree 15, ?. disagree 18. agree 19. disagree 20. 129*.25 = 32.25 Rather than typing "(my answer)," just use "***" to indicate that. It will save you lots of typing.

**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...