# Posts by PsyDAG

Total # Posts: 23,187

**science**

More data needed.

*February 14, 2016*

**Maths**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Either-or probabilities are found by adding the individual probabilities.

*February 13, 2016*

**MATH**

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. However, I will start you out. Prem scored 95 corectly.

*February 13, 2016*

**Physiology**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. https://www.google.com/search?client=safari&rls=en&q=use+it+or+lose+it+neurology&ie=UTF-8&oe=UTF-8&gws_rd=ssl

*February 13, 2016*

**math**

There is no "b" in your question. Where is an exponent? Typos? It would help if you proofread your questions before you posted them.

*February 12, 2016*

**math**

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 previous post.

*February 12, 2016*

**math**

x + 2

*February 12, 2016*

**Math**

(2+1+1)/(3+4+3) = ?

*February 12, 2016*

**MATH HELP ASAP**

The "following" (above) are not statements. MO = 124 NO = MN = 62

*February 12, 2016*

**Algebra 1 (variable expressions)**

6*(5-9)-5 = 6*(-4)-5 = -24-5 = ?

*February 12, 2016*

**Maths**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Either-or probabilities are found by adding the individual probabilities. (.7*5/7) + (.3*1/6) = ?

*February 12, 2016*

**Math (?)**

Lacking data.

*February 11, 2016*

**MATH HELP**

18/53 = 34%

*February 11, 2016*

**statistics**

What is the original question? ∑x = 5+2+4+2 = ?

*February 11, 2016*

**maths**

6:12 = 2:4

*February 11, 2016*

**College Math**

I'm confused too. Data is lacking.

*February 11, 2016*

**biology**

No diagram.

*February 11, 2016*

**biology**

No diagram. Cannot copy and paste here.

*February 11, 2016*

**Statistic**

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 "...

*February 10, 2016*

**Math**

3.6:(30*12) = ?

*February 10, 2016*

**MATH HELP**

Removing the 16 and 86 would not effect the median.

*February 10, 2016*

**MATH HELP**

Mean = ∑x/n Calculate the mean with all the scores, then calculate the mean without the 50.

*February 10, 2016*

**math**

Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown. n = .73 * 215 23/94 = n/100

*February 10, 2016*

**Math**

1.3x = 182 Solve for x.

*February 10, 2016*

**Math**

92/45 = x%/100

*February 10, 2016*

**Math**

1.2x = 42 Solve for x.

*February 10, 2016*

**Math**

When multiplying/dividing, exponents are added/subtracted respectively. 9 - (-4) = 9 + 4 = 13 -10 - (-5) = -10 + 5 = -5 m^13(t^-5)

*February 9, 2016*

**Math**

Triangle has total of 180 degrees.

*February 9, 2016*

**Science**

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

*February 9, 2016*

**science**

OCPE

*February 9, 2016*

**Biology**

Zygote?

*February 9, 2016*

**Statistics**

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 related to the Z score.

*February 8, 2016*

**math**

Convert all distances to the same unit, meters.

*February 8, 2016*

**fraction**

Need to complete your parenthesis.

*February 8, 2016*

**Health-Please Help!!!**

All look correct.

*February 8, 2016*

**Statistics**

Number of students in each class? 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...

*February 8, 2016*

**science**

Do they have the same mass?

*February 8, 2016*

**algebra**

Correction: anything times one is that quantity.

*February 8, 2016*

**algebra**

anything plus 1 is that quantity. 2 + xx

*February 8, 2016*

**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. See later post.

*February 8, 2016*

**science**

No pulley system shown. Cannot copy and paste here.

*February 7, 2016*

**Mathematics**

Range = max - min

*February 7, 2016*

**math**

F, T, F, T

*February 7, 2016*

**Math**

Susie 2 * 2 = 4 Bobby 3 * 1 1/3 = 4

*February 7, 2016*

**Math**

If x = one number, then the other is x+4. x + x+4 = 32 Solve for x.

*February 7, 2016*

**biology**

What is you question?

*February 7, 2016*

**maths**

It doesn't make sense. If "chocolate were packed equally in 21 boxes," there would be many more than 18 per box. 630/18 = boxes needed.

*February 7, 2016*

**Math**

1.5/3 = ?

*February 6, 2016*

**statistics**

Z = (score-mean)/SD = (45-45)/4 = 0 Need the parenthesis. b. Z = (30-45)/4 = -15/4 = ? c. No. 1.5 = (x-45)/4 Solve for x. d. Z = (41-45)4 = -1 Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the ...

*February 6, 2016*

**statistics**

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 between the two Z scores. Multiply by 100 to get the percentage.

*February 6, 2016*

**Verbal reasoning**

Not knowing what you want to relate to fly, I would pick rapid vs. slow.

*February 6, 2016*

**algebra**

Reiny is right. I goofed. Mia Culpa.

*February 6, 2016*

**algebra**

P.S. Making a mistake does not mean you are dumb. We all make mistakes. However, if you keep making the same mistake, then you might be dumb.

*February 6, 2016*

**algebra**

Let d = # dimes and n = # nickels. d = 2n 10d + 5n = 195 Substitute 2n for d in the second equation and solve for n. Insert that value into the first equation to solve for d. Check by putting both values into the second equation.

*February 6, 2016*

**maths**

Revolution = one circumference C = πd cm = 1/100m Km = 1000m Can you put those together to solve the problem?

*February 6, 2016*

**Algebra**

The Y-intercept is where the lines pass through the Y axis.

*February 6, 2016*

**math**

F = 4J (F+22) = 2(J+22) Substitute 4J for F in the second equation and solve for F. Insert that value into the first equation to solve for J. Check by putting both values into the second equation.

*February 6, 2016*

**statistics**

Need data. What is the mean and Standard deviation for weight of newborns?

*February 6, 2016*

**math**

Ray paid $K for 1/2 hour Bill needs to pay for 7(1/2 hour) Bill paid $K + 2.5(2/3K)

*February 6, 2016*

**Statistics**

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 of the Z score. Multiply by 600.

*February 5, 2016*

**Statistics**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. a. .25 * .25 * .75 = ? b. .75^3 = ? I'll leave c and d for you.

*February 5, 2016*

**MATH**

Assuming that a side is not a fraction of a length, the first square cannot use 17 lengths for a square perimeter.

*February 5, 2016*

**math**

1/2x = 3 Solve for x. Cannot draw or use strips here.

*February 5, 2016*

**Mat**

Assuming that you are talking about a cube, two sides would be 4 by 4, and 4 sides would be 4 by 2.

*February 5, 2016*

**Statistics**

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 of the Z score. How does it compare to .05?

*February 4, 2016*

**Math (?)**

Contradiction here. You originally say each crate "holds 10 vases."

*February 4, 2016*

**math**

Sum even = 2, 4, 6, 8, 10, 12 Mult. of 3 = 3, 6, 9, 12 Note that 6 and 12 fit both criteria. Either-or probabilities are found by adding the individual probabilities.

*February 4, 2016*

**Basic 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 "...

*February 4, 2016*

**Algebra**

Do you know the 68-95-99.7 rule? Approximately 68% of scores in normal distribution are within one standard deviation (34% on each side of the mean), 95% within 2 SD, and 99.7% within 3 SD. ±3Z = (score-mean)/SD

*February 4, 2016*

**Math**

32 * 2.1^5 = 32 * 40.8 = 1307

*February 4, 2016*

**Math**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. We cannot graph on these posts.

*February 4, 2016*

**algebra**

Let x = hours 10 + 5x = 40 + 3x Solve for x.

*February 4, 2016*

**science**

The individual tutors are not online all the time, so some questions may seem to take a relatively long time to get a response from someone with the specific expertise needed. Both factors typically increase as the depth decreases, allowing many marine creatures to survive.

*February 4, 2016*

**setswana (?)**

We are only able to respond to questions in English. Also, indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.

*February 4, 2016*

**math**

(1-.2) * 924 = 739.20 (1+.2) * 924 = 1108.8

*February 4, 2016*

**math**

Need data. What is the height?

*February 4, 2016*

**math**

Especially if we are from different backgrounds, don't assume that we know what abbreviations mean. What are S.P. and C.P.?

*February 4, 2016*

**math**

Do you have a recipe available?

*February 4, 2016*

**Science**

Do you think the the tied end is completely leak proof?

*February 4, 2016*

**math**

4/10 4/10 * 40 I'll let you reason it out.

*February 3, 2016*

**Statistics**

Unless the curve is normal, the median and mean may not be the same and you cannot calculate the percentages with a Z score. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the ...

*February 3, 2016*

**Statistics**

That may be the notation, but it does not = married.

*February 3, 2016*

**Math**

The question is not how much greater, but "How many times greater." 3.05/6.10 = 50% greater

*February 3, 2016*

**Bio**

Need more data. What genes are dominant or recessive?

*February 3, 2016*

**mathematics**

Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Is this what you mean? (4x^2)/3 + (5x^1)/3 - 6 Or do you mean this? 4x^(2/3) + 5x^(1/3) - 6 Or something else?

*February 3, 2016*

**mathematics**

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.

*February 3, 2016*

**science**

1. yes 2. no 3. yes 4. Even with internal fertilization, millions of sperm are released. Does that help?

*February 3, 2016*

**maths**

M = 2y (M-8) = 3(y-8) Substitute 2y for M in the second equation and solve for y.

*February 3, 2016*

**math**

let x = total students .4x = 972 Find x, then subtract 972 from that.

*February 3, 2016*

**Math Ms. Sue writeteacher anyone plz help!!!**

No, area = hb/2

*February 3, 2016*

**science/maths**

D = s * t D = 30(10) + 50(20) = ?

*February 3, 2016*

**math**

b = a-2 Area = ba/2 Substitute a-2 for b in the second equation and solve for a.

*February 3, 2016*

**maths**

What is your question? Also lacking data.

*February 3, 2016*

**science**

It would help if you proofread your questions before you posted them. "theaerasolto"?

*February 3, 2016*

**Algebra**

mean = ∑x/n 64 = (71+62+64+x)/4 Solve for x.

*February 2, 2016*

**English**

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.

*February 2, 2016*

**math**

P(colored) = 10/14

*February 2, 2016*

**Algebra**

Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Tank = 2 * 3 * 4 = 24ft^3 Water = 2 * 3 * h = 20ft^3

*February 2, 2016*

**Algebra**

Income = .14x + 1300

*February 2, 2016*

**maths**

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.

*February 2, 2016*