Sunday

April 19, 2015

April 19, 2015

Total # Posts: 19,686

**statistics**

Z = (score-mean)/SD Do you know the 68-95-99.7 rule? Approximately 68% of scores in normal distribution are within one standard deviation (Z)(34% on each side of the mean), 95% within 2 SD, and 99.7% within 3 SD.
*February 26, 2015*

**Math - Algebra**

Could be that the ride home be downhill?
*February 26, 2015*

**Math (?)**

37 + 58 = 95 ≠ 220
*February 26, 2015*

**Math?**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. What is your question?
*February 26, 2015*

**math**

x < 45 3x > 5 127 ≤ x x ≤ 50
*February 26, 2015*

**algebra**

Factor the 6. Which factor times 3 plus the other factor = 11?
*February 25, 2015*

**Math**

I don't get one of those answers either. 45 - 30 = 15
*February 25, 2015*

**math**

You do not add another 30 to each of the fractions. 30 + 30/3 + 30/5 = 30 + 10 + 6 = 46
*February 25, 2015*

**Algebra 2**

(-2)^2 + 4(-2) = 4 - 8 = -4
*February 25, 2015*

**Urgent math help**

X intercept is where y = 0. Insert value and calculate.
*February 25, 2015*

**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.
*February 25, 2015*

**Algebra**

I don't know how you reached that answer either. a^1/a^2 = (a)/(a*a) = 1/a
*February 25, 2015*

**Communications**

If Tay was really talking about fly fishing, he won't need a frying pan, but will need enough space in the classroom to demonstrate the casting and using the landing net. Will you be wearing waders?
*February 25, 2015*

**Math**

V = 4/3π*r^3 Insert values and calculate.
*February 25, 2015*

**math**

2c + 2p + pot = 10.20 p = c/2 pot = c + 3 Substitute c terms for p and pot to solve for c. Then use third equation to solve for pot.
*February 25, 2015*

**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 your later post.
*February 25, 2015*

**Math**

3J = G (J +15) + (G + 15) = 110 Substitute 3J for G in the second equation and solve for J. Insert that value into the first equation to solve for G. Add 15 to each.
*February 25, 2015*

**intermediatealgera**

Multiply all terms by x. 2x - 2x - 4 - 2x Combine like terms.
*February 25, 2015*

**intermediatealgera**

Use process indicated in your following post.
*February 25, 2015*

**Arithmetic**

One must be negative. Try factoring -70.
*February 24, 2015*

**Statistics**

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.
*February 24, 2015*

**algebra1**

Use process suggested in previous post.
*February 24, 2015*

**Algebra 1**

Subtract first equation from the second.
*February 24, 2015*

**Statistics**

Mode http://drdavespsychologypage.homestead.com/Two___Two_____four.pdf
*February 24, 2015*

**math**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. If replacement, then: 3/12 * 5/12 = ?
*February 24, 2015*

**statistics**

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability to the left of Z. Since Z is negative, it is in the smaller portion.
*February 24, 2015*

**statistics**

Use Z table.
*February 24, 2015*

**maths-probability**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 2/n * 1/(n-1) = 1/28 If they haven't been replaced, the probability of picking a red = 0.
*February 24, 2015*

**Biology - Genetics**

An autosome is a chromosome that is not an allosome (i.e., not a sex chromosome). Autosomes appear in pairs whose members have the same form but differ from other pairs in a diploid cell, whereas members of an allosome pair (XX, XY) may differ from one another and thereby ...
*February 23, 2015*

**Math**

3/2 * 18 = ?
*February 23, 2015*

**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.
*February 23, 2015*

**Psych 42 (Stats)**

Same process as following post from Alecia.
*February 23, 2015*

**Science**

Since this is not my area of expertise, I searched Google under the key words "fluorine element" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=fluorine+element&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the ...
*February 23, 2015*

**child psychology in general**

I definitely agree with B. Assuming that the experiments were not faulty, the theory needs to be rejected or at least modified.
*February 23, 2015*

**Maths**

272 + 325 = ?
*February 22, 2015*

**statistics**

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. 95% = mean ± 1.96 SEm SEm = SD/√n
*February 22, 2015*

**math**

(x-1)(x+2)-(x-3)^2 = (x^2+x-2) - (x^2-6x+9) = x^2+x-2-x^2+6x-9 = ? Combine like terms.
*February 22, 2015*

**statistics**

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 it for you. A. 400 + 1 = 401
*February 22, 2015*

**statistics**

16/40 Reduce.
*February 22, 2015*

**statistics**

You cannot copy and paste here.
*February 21, 2015*

**Statistics**

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 begin. A. Does cell phone radiation increase the probability of tumors?
*February 21, 2015*

**math**

P = 2L + 2W = 36 + 12 = 48 cm Since you are rounding the error for each L and W < .5 cm. With 4 sides, the should be < 2 cm. Now, you find the percentage.
*February 21, 2015*

**math**

agree.
*February 21, 2015*

**statistics**

Z = (score-mean)/SD ±3 = (score-158)/8 Solve for both the negative and positive values.
*February 21, 2015*

**Math**

C = πd = 3.14 * 2.5 = ? Area of towel = ? * 10 * 15 Of course, this will be a little off, since the circumference will increase as the layers accumulate.
*February 20, 2015*

**Last help Thanks**

The ratio is 4:7, but the odds are 4/11, # Ss vs the total possible choices.
*February 20, 2015*

**Satistics Help**

Typos? Odds of winning = a/(a+b) = # winning games over total.
*February 20, 2015*

**Statistics**

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. Standard deviation = square root of variance I'll let you do the ...
*February 20, 2015*

**Psyc**

What is your question? You cannot copy and paste here.
*February 20, 2015*

**life orientation**

I assume you are talking about approach-avoidance conflicts, which will lead to vacillation (alternating approach and avoidance without ever accomplishing the goal). Types of Internal Conflicts I. Approach-approach involves two or more positive goals. It is easily resolved (...
*February 20, 2015*

**Math**

72º/3 = 24º per slice 360º/24º = ?
*February 19, 2015*

**Biology**

Zunie forgot that the male is XY, and the Y chromosome does not contain a color vision gene. Use a Punnett square. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*February 19, 2015*

**Math**

We do not have data for the number of chores, but we do have data for the number of hours worked. Again, hours of chores/summer month = 5 * 4 * 1.5 = 30 hours per 20 weeks If you do not have a typo, hours of chores/winter month = 6 hours per 28 weeks Mean = ∑x/n = (30+6...
*February 19, 2015*

**Math**

d = rt = 5 * 8/60 = ? ?/(10/60) = r = miles/hour
*February 19, 2015*

**business math**

It would help to know the specific problem.
*February 19, 2015*

**math please help**

First triangle has a perimeter of 18 = 3 + 7 + 8. 54/18 = 3 So if they are "similar," each side must be three times larger.
*February 19, 2015*

**Anthropology**

Formal sanctions typically involve fines, incarceration and/or execution. Informal sanctions typically involve scorn, rejection and/or exclusion.
*February 19, 2015*

**math**

Best estimate = 2/8 * 120 = ?
*February 19, 2015*

**math**

Best estimate = 6/300 = ? ? * 1800 = ??
*February 19, 2015*

**math**

The answer is either 12/35 or 35/12, depending on which version of the problem is correct. Neither one reduces to 5/6.
*February 19, 2015*

**math**

Is it (3/7)d or 3 divided by 7d? If the latter, multiply both sides by d 3/7 = (5/4)d Multiply both sides by 4/5. d = 3/7 * 4/5 = 12/35 If the former, Multiply both sides by 7/3 d = 7/3 * 5/4 = ?
*February 19, 2015*

**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.
*February 19, 2015*

**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.
*February 19, 2015*

**Math**

Summer = 5 * 4 * 1.5 = hours/week It would help if you proofread your questions before you posted them. He only did 6 hours of shoveling for the 7 cold months? Mighty sparse snowfall.
*February 18, 2015*

**science**

Since this is not my area of expertise, I searched Google under the key words "transporters of protein in plants" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=transporters+of+protein+in+plants&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the...
*February 18, 2015*

**math**

Is this what you mean? d^2+1/d+(7*5d/d)-1d d/d = 1 Multiply by d. d^3 + 1 + 35d - d = ?
*February 18, 2015*

**math**

C = $49 + $20m
*February 18, 2015*

**algebra**

What formula? What is your question? You cannot copy and paste here.
*February 18, 2015*

**Statistics**

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.
*February 17, 2015*

**Science**

1. Shape determines which other nerves they stimulate. 2. An organ consists of many different kinds of tissues.
*February 17, 2015*

**Biology**

What mutation?
*February 17, 2015*

**statistics**

Z = (score-mean)/SE 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. How does P = .05 compare?
*February 17, 2015*

**science**

Can't tell unless we get speed for last third.
*February 17, 2015*

**Math**

Assuming same number of stairs between each floor: 3rd floor --> up two floors 6th floor --> up six floors Got it?
*February 16, 2015*

**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. Standard deviation = square root of variance I'll let you do the ...
*February 16, 2015*

**Math**

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. Standard deviation = square root of variance I'll let you do the calculations.
*February 16, 2015*

**Algebra**

What is your question?
*February 16, 2015*

**Interpersonal communication**

Definitely true. We each have a code book (language, etc.) that we use. We need to use that to communicate, hoping that the receiver has a code book that can decode your message. Check out this article: http://drdavespsychologypage.homestead.com/Communication_Confusion.pdf
*February 16, 2015*

**math**

laps < 10
*February 16, 2015*

**science**

Assuming that the jar is air tight, the flame will go out once the oxygen in the jar is used up.
*February 16, 2015*

**Chemistry needs help**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
*February 16, 2015*

**costs**

25/4 = x/.59 Solve for x.
*February 16, 2015*

**Chemistry needs help**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
*February 16, 2015*

**anthropology**

Good as far as you went, but you didn't discuss if "we should impose our values on those cultures." What are your thoughts about that?
*February 16, 2015*

**Probability**

Network not shown. You cannot copy and paste here.
*February 16, 2015*

**statistics**

Z = (score-mean)/SD = (17-mean)/SD Which has the highest Z score?
*February 15, 2015*

**stats**

95% = mean ± 1.96 SEm SEm = SD/√n
*February 15, 2015*

**math**

4 - .4 = ?
*February 15, 2015*

**math**

In what time zone? 7:15 + 5 hours - 5 minutes = ?
*February 15, 2015*

**algebra**

35/45 = ? gallons
*February 15, 2015*

**MATH**

Please do not use all caps. Not only is it harder to read, but it is like SHOUTING online. Thank you. What question?
*February 15, 2015*

**science**

Since this is not my area of expertise, I searched Google under the key words "electrostatic precipitator" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=electrostatic+precipitator&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you ...
*February 13, 2015*

**Math**

248/100 = 124/50 = 62/25
*February 13, 2015*

**statistics**

Didn't I answer this previously? 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. Range = highest score minus lowest Find ...
*February 13, 2015*

**math**

2 1/5 = 11/5
*February 12, 2015*

**Math**

Insufficient data.
*February 12, 2015*

**science 1 question**

I would say B.
*February 12, 2015*

**Math**

Let x = longest side of the triangle x + x/2 + (x-7) = 53 Solve for x, then x/2 and x-7.
*February 12, 2015*

**Math: Probability**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Assuming there is no replacement: P(red,red) = 3/10 * 2/9 = ? P(red,blue) = 3/10 * 4/9 = ?
*February 12, 2015*

**Statistics**

Discrete only can be whole numbers, no partial.
*February 12, 2015*