Thursday

April 28, 2016
Total # Posts: 21,589

**math**

Use same name. 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.
*November 30, 2015*

**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 between the Z scores. Multiply by 100.
*November 30, 2015*

**science**

System (without "eliminate")
*November 30, 2015*

**algebraic expression**

Right.
*November 30, 2015*

**Maths**

Mode is most frequently observed score. Mean = ∑x/n = (0*4) + (1*8)… /20 = ?
*November 30, 2015*

**Science plz help**

If you do not have these resources available to you, Google them.
*November 30, 2015*

**math**

Cannot make tables on this post. 5 * 6 = ?
*November 29, 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.
*November 29, 2015*

**Statistic**

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 (.15) and its Z score. Insert Z value into above equation and solve for score.
*November 28, 2015*

**Science**

Since this is not my area of expertise, I searched Google under the key words "earth tilt and sunlight" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=earth+tilt+and+sunlight&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can ...
*November 28, 2015*

**Science**

What squares and outline?
*November 28, 2015*

**math**

If P(3,6,8) means 3 or 6 or 8, then either-or probabilities are found by adding the individual probabilities (1/9). If P(3,6,8) mean 3 then 6 and then 8, if the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities ...
*November 28, 2015*

**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. You are talking about one side out of six.
*November 28, 2015*

**Math**

(990 - 900)/900 = ?
*November 28, 2015*

**algebra (check answers)**

1. 2(x+5) + 2(2x-1) = 2x+10 + 4X -2 = ? 2. First one right. 6x-8 - 2x + 5 = ? 3. Right
*November 28, 2015*

**physics needs help**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
*November 27, 2015*

**Science**

An experiment needs a control group.
*November 27, 2015*

**maths**

1. 1.01 * 50 = ? 2. 2L + 2W = Perimeter 3. 40 + 12(20) = ? Compare to 250.
*November 26, 2015*

**math**

2L + 2W = perimeter What is the width?
*November 26, 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 related to the Z score.
*November 26, 2015*

**statistics(business)**

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.
*November 26, 2015*

**science**

Revolution of what?
*November 26, 2015*

**Statiatics**

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. I'll help on the last one. 5/(5+4+3) = ?
*November 25, 2015*

**Math (?)**

How can a car go 50 mph in zero hours?
*November 25, 2015*

**HEALTH PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

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. Resubmit with your answers.
*November 25, 2015*

**Science**

Because we don't know what an "átomo" is?
*November 25, 2015*

**Ciencias**

Trato contestar en Inglés. Antibiotic use can promote development of antibiotic-resistant bacteria. Every time a person takes antibiotics, sensitive bacteria are killed, but resistant germs may be left to grow and multiply. Repeated and improper uses of antibiotics are ...
*November 25, 2015*

**Ciencias**

Es mejor a preguntar en Inglés. No sé "estafiilococo."
*November 24, 2015*

**math**

Because the sum of the first column > 9.
*November 24, 2015*

**Math**

J - 6 = 4(F-6) = 4F -24 Therefore J = 4F - 18 J + 4 = 2F Substitute 4F-18 for J in the third equation and solve for F. Insert that value into the second equation to solve for J. Check by putting both values into the third equation.
*November 24, 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 ...
*November 23, 2015*

**Math**

Online "^" is used to indicate an exponent, e.g., x^2 = x squared. Cannot post diagrams here.
*November 23, 2015*

**Algebra 2**

No data. Models of what? How long does it take to produce one model? What are the costs of producing one model?
*November 23, 2015*

**Science**

The moon is smaller than the earth, so its gravitational pull is less.
*November 23, 2015*

**psychology**

Sensory adaptation is becoming less sensitive to a stimulus after sensing it continuously for a period of time. Let me give you a real life example — mine. Decades ago, I worked in an old home with several buildings. Even though they tried to keep the buildings clean, the...
*November 23, 2015*

**math**

(8/3)/8 = x/11 (8/3)/8 = x/6 Solve for x.
*November 23, 2015*

**math**

What is your question? 40/7?
*November 23, 2015*

**math**

How many shrubs?
*November 23, 2015*

**Math**

12.5 * (1-.75) = blue 32/3 * (1-.8) = white Add blue and white.
*November 23, 2015*

**Math**

3.25/1 = x/2.75 Solve for x.
*November 23, 2015*

**MATH**

25.5 * 82 = ?
*November 23, 2015*

**Math**

20 - 6.5 - 29/8 = ?
*November 23, 2015*

**MATH**

44 * 3/4 = number Already have the fraction in the information.
*November 23, 2015*

**math**

No values given.
*November 23, 2015*

**Pre-Algebra (Partial)**

Too many to respond to. However, first 5 are correct.
*November 22, 2015*

**algebra**

Online "^" is used to indicate an exponent, e.g., x^2 = x squared. L = 5W LW = 80 Substitute 5W for L in the second equation and solve for W. Insert that value into the first equation to solve for L. Check by putting both values into the second equation.
*November 22, 2015*

**math 5th grade**

No, you are making it too hard. The problem (as you indicated it) does not indicate that you have to convert it to ounces. 2 - 2/5 - 3/10 = 2 - .4 - .3 = 1.3 pounds
*November 21, 2015*

**Pure Math**

https://www.google.com/search?client=safari&rls=en&q=stem+and+leaf+plots&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=_SlSVuqTN-SD8Qedr4LADg
*November 21, 2015*

**Pure Math**

See later post.
*November 21, 2015*

**Math word problem**

Right!
*November 21, 2015*

**Math**

Was the "percent of fat calories that a person in America consumes each day" determined by this sample? If so, this sample is too small to generalize to the population. If not, I would assume that the data was found with a larger sample and apply the normal ...
*November 20, 2015*

**science**

What are your choices? Habit?
*November 20, 2015*

**Statistics**

Unclear. Typo? Z = .12/2 = .06? Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.06) and its Z score.
*November 20, 2015*

**Chemistry?**

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?
*November 20, 2015*

**Behavioral Statistics Help!**

How would you respond, if a bonus was taken away? Using "the same subjects tested in both situations" would lead this to happen.
*November 20, 2015*

**Statistics**

In the patient's mind, the placebo reduces anxiety (and therefore some of the stress). This reduction can decrease the perceived pain. http://drdavespsychologypage.homestead.com/Placebo_Power.pdf http://drdavespsychologypage.homestead.com/Placebo_Power_Doubled.pdf
*November 20, 2015*

**algebra**

https://www.google.com/search?client=safari&rls=en&q=cumulative+frequency+table&ie=UTF-8&oe=UTF-8&gws_rd=ssl
*November 19, 2015*

**Math**

A square has all sides equal.
*November 19, 2015*

**math**

Distance = rate times time 10 = 65t 10 = 50t Solve for t, convert to minutes and compare.
*November 19, 2015*

**Stats**

No table. You cannot copy and paste here.
*November 19, 2015*

**math**

What is the "same" exchange rate?
*November 19, 2015*

**Science**

Since this is not my area of expertise, I searched Google under the key words "evolution evidence" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=evolution+evidence&ie=UTF-8&oe=UTF-8&gfe_rd=ssl&ei=6WJPVqyVB-aD8QfPwbWgDA In the ...
*November 19, 2015*

**science**

Density = mass/volume
*November 19, 2015*

**Statistics**

A) small sample. What experiment? B) If that is the first quartile, then 25% would consume 34.31 fat calories or less. Consumption ≤ 34.51
*November 19, 2015*

**Algebra**

When multiplying, exponents are added. 1. x^2/9 2. 16a^4/c^8
*November 19, 2015*

**Physics needs help**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
*November 19, 2015*

**scale factors**

3.5/1 = x/20 Solve for x.
*November 19, 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 ± Z(SEm) SEm = SD/√n Need value of SD.
*November 19, 2015*

**Science**

What solution?
*November 18, 2015*

**4th grade math**

How many 1/2 dozen and/or 1 dozen batches did she sell. For example: 6 half-dozen = $30 - $10 = $20 profit. 3 dozon = ? 2 half-dozen and 2 dozen = ? etcetera
*November 18, 2015*

**math**

b - .7b = Sale price
*November 18, 2015*

**Math**

It helps to indicate each answer WITH the question e.g., ***. 1. yes 2. No 3. No 4. Yes 5. Typo? 6. Yes 7. Yes 8. No 10. Yes
*November 18, 2015*

**Math**

We cannot chose for you.
*November 18, 2015*

**math**

It would help if you proofread your questions before you posted them. Typo?
*November 18, 2015*

**Math**

What rectangles? Cannot copy and paste here.
*November 17, 2015*

**Pre Algebra Math**

To check answers, we need to know what the problems are.
*November 17, 2015*

**Algebra(Please Help ASAP)**

Let x = tree height x/8 = 6/4 Solve for x.
*November 17, 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.
*November 17, 2015*

**Business**

With data so spread out, it is essentially impossible to evaluate.
*November 17, 2015*

**biology**

Since this is not my area of expertise, I searched Google under the key words "purines in DNA" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=purines+in+DNA&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the future, you can find the information ...
*November 17, 2015*

**maths**

1000km/2cm = xkm/2.5cm Solve for x.
*November 16, 2015*

**maths**

2/5 = x/15 20 - x = ?
*November 16, 2015*

**Southwark**

52 > 36
*November 16, 2015*

**Math**

B = 2S B - 600 = P B + P + S = 6900 2S + (B-600) + S = 6900 2S + (2S-600) +S = 6900 Solve for S.
*November 16, 2015*

**Math**

L = 2W + 8 2L + 2W = 100
*November 16, 2015*

**algebra**

It would help if you proofread your questions before you posted them. What quadratic function?
*November 16, 2015*

**Math**

http://www.celsius.co.uk/converter/
*November 16, 2015*

**Psychology**

The photoreceptor would sense brightness, whether rod or cone. However, since the cones work in combination to sense colors, that would not happen. Amount of light = brightness.
*November 16, 2015*

**Science**

What questions? We do not have lesson 9. 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.
*November 16, 2015*

**spanish**

What are your choices? ellos dan?
*November 16, 2015*

**biology**

Since this is not my area of expertise, I searched Google under the key words "history of the discovery of DNA" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=history+of+the+discovery+of+DNA&ie=UTF-8&oe=UTF-8&gws_rd=ssl In the ...
*November 16, 2015*

**math**

For whole numbers, 2 and 1. If fractions, it can almost be infinite.
*November 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 ...
*November 15, 2015*

**English**

Noun
*November 15, 2015*

**college math**

3/5 = x/2000 Solve for x.
*November 15, 2015*

**statistics**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. 1/49 * 1/48 * 1/47 * 1/46 * 1/45 * 1/44 = ? There is an equation for this, but I don't remember it.
*November 15, 2015*

**Math 6th grade**

Verbal presentation is presentation with words (e.g., two thousand fourteen).
*November 15, 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.
*November 15, 2015*

**math**

Let x = John's age (x-4)/2 = (x+5)/3 Solve for x.
*November 15, 2015*

**Algebra**

21.25
*November 15, 2015*