Friday

March 6, 2015

March 6, 2015

Total # Posts: 19,372

**Maths**

y = 3x - 1 x^2 + (3x-1)^2 = 12 x^2 + (9x^2 - 6x + 1) = 12 10x^2 - 6x - 11 = 0 I don't see factors for this equation.
*May 7, 2014*

**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 related to the Z score.
*May 7, 2014*

**math (?)**

It would help if you proofread your questions before you posted them. Data missing.
*May 7, 2014*

**science**

Yes
*May 7, 2014*

**science**

Since this is not my area of expertise, I searched Google under the key words "function of the nucleus in a cell" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=function+of+the+nucleus+in+a+cell&ie=UTF-8&oe=UTF-8 In the future, ...
*May 7, 2014*

**math**

1. D 2. A
*May 7, 2014*

**statistics**

8/46 = W/3000 Solve for W.
*May 7, 2014*

**Math (?)**

What is your question?
*May 7, 2014*

**Math (?)**

Lack data.
*May 6, 2014*

**Math**

5 can be obtained by 4,1; 1,4; 2,3 or 3,2. 4/36 = ?
*May 6, 2014*

**Math!!**

Online "^" is used to indicate and exponent, e.g., x^2 = x squared. 27 + (3+2*5)^2 = 27 + 13^2 = ? OR 27 + 3 + 2*5^2 = 30 + 50 = ? OR 27 + 3 + (2*5)^2 = 30 +100 = ?
*May 6, 2014*

**science**

I would agree.
*May 6, 2014*

**Algebra 2**

Online "^" is used to indicate and exponent, e.g., x^2 = x squared. 4^-2 = (1/4)^2 = 1/4 * 1/4 = 1/16
*May 6, 2014*

**Math 221**

4y^3 u^2
*May 5, 2014*

**biology (?)**

What are your alternatives? You cannot copy and paste here.
*May 5, 2014*

**Algebra**

(-5x/x+3)-(7/x+3) (-5x-7)/(x+3)
*May 5, 2014*

**math (?)**

What is your question?
*May 5, 2014*

**Science**

Since this is not my area of expertise, I searched Google under the key words "energy transformations during skydiving" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=energy+transformations+during+skydiving&ie=UTF-8&oe=UTF-8 In ...
*May 5, 2014*

**math**

75 + 3s < 12s
*May 5, 2014*

**Algebra**

3 * 1 = 3 5a * a^2 = 5a^3 When multiplying terms, you add the exponents.
*May 5, 2014*

**math**

These are factors you consider important, and will vary with your needs. For example, are you going to use their credit card. If you pay off the card completely each month, the interest on the amount carried forward will have little meaning for you. If not, it may be an ...
*May 5, 2014*

**probability**

If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events. Spade = 13/52, club = 13/(52-1) face = 12/52, 8 = 4/(52-1) I don't know how they could be wrong either. Text typos?
*May 4, 2014*

**math**

Since this is not my area of expertise, I searched Google under the key words "three sections of the statement of cash flows" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=three+sections+of+the+statement+of+cash+flows&ie=UTF-8&oe...
*May 4, 2014*

**math**

https://www.google.com/search?client=safari&rls=en&q=mean+absolute+deviation&ie=UTF-8&oe=UTF-8
*May 4, 2014*

**statistics**

Ho: µ Pop = µ sample Ha: µ Pop < µ sample 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 ...
*May 4, 2014*

**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 related to the Z score.
*May 4, 2014*

**Science**

Since this is not my area of expertise, I searched Google under the key words "ethical issues behind cloning" to get these possible sources: http://search.aol.com/aol/search?query=ethical+issues+behind+cloning&s_it=client-addressbarmac-unauth In the future, you can ...
*May 4, 2014*

**Statistics**

Statistical?
*May 4, 2014*

**algebra (?)**

What is your question?
*May 4, 2014*

**algebra**

(7√π)/(√π) = 7
*May 4, 2014*

**Science**

Since this is not my area of expertise, I searched Google under the key words "Forces affecting falling objects" to get these possible sources: http://search.aol.com/aol/search?query=Forces+affecting+falling+objects&s_it=client-addressbarmac-unauth In the future, you...
*May 4, 2014*

**Statistics**

95% = mean ± 1.96 SEm SEm = SD/√n Where does 4 cm fit in this distribution?
*May 4, 2014*

**applied statistics**

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. Would you say that mother's age might cause number ...
*May 4, 2014*

**math**

295 + .15(k-1000) < 389 Solve for k.
*May 3, 2014*

**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 "...
*May 3, 2014*

**Math**

Q = 2.5D 10D + 25Q = 225 Substitute 2.5D for Q in second equation and solve for D. Insert that value into the first equation and solve for Q. Check by inserting both values into the second equation.
*May 3, 2014*

**statistics**

4. C 5. B
*May 3, 2014*

**statistics**

B. However, there is no data given that indicates which diet lost more pounds.
*May 2, 2014*

**Science**

Essentially all species have dominant and recessive traits. Once you know the genotypes of the parents, you can use a Punnett square to determine the frequencies in the offspring.
*May 2, 2014*

**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 your later post.
*May 2, 2014*

**math 1 question pls help!!!**

(138-129)/138 = ?
*May 2, 2014*

**Math needs help**

Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question.
*May 2, 2014*

**algebra (?)**

It would help if you proofread your questions before you posted them. What is the power of x?
*May 2, 2014*

**maths**

3.14 = π. Are you sure that value is for the radius? SA = πrs + πr^2
*May 2, 2014*

**Math**

(x^3-2x-4)/(x-2)
*May 2, 2014*

**statistics**

Were the subjects expressing liking of both animals the same or different? Need to know total number of subjects.
*May 2, 2014*

**Statistics**

Gets smaller
*May 2, 2014*

**math**

No figure shown. Online "^" is used to indicate and exponent, e.g., x^2 = x squared. It would help if you proofread your questions before you posted them. You omitted π. V = 4/3πr^3 = 4/3 * 3.14 * 4.5 * 4.5 *4.5 = ?
*May 2, 2014*

**math (?)**

What formula?
*May 2, 2014*

**Math 2**

3/5
*May 2, 2014*

**Algebra**

(1/3)/4 = ?
*May 2, 2014*

**Science**

No, what if the water is calm?
*May 2, 2014*

**Math**

Only 8/8 and 2/2 can be written as 1.
*May 1, 2014*

**statistics**

two-sample t-test
*May 1, 2014*

**Space Exploration**

Can you divide into capital and maintenance costs?
*May 1, 2014*

**math**

Since this is not my area of expertise, I searched Google under the key words "how much lottery revenue has been allocated to education in North Carolina" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=how+much+lottery+revenue+has...
*May 1, 2014*

**math (?)**

What are your choices? You cannot copy and paste here.
*May 1, 2014*

**Math**

It doesn't look like you did a problem. 2x - 28 + 3 = 7x + 5 -30 = 5x -6 = x
*May 1, 2014*

**Statistics**

.05 * 300 = 15 This means you would expect 15 tests to be significant solely by chance.
*May 1, 2014*

**Statistics**

With your limited data, I would pick C, because the confidence level includes zero.
*May 1, 2014*

**science**

Since this is not my area of expertise, I searched Google under the key words "restriction enzymes genetic engineering" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=restriction+enzymes+genetic+engineering&ie=UTF-8&oe=UTF-8 In ...
*May 1, 2014*

**Algebra**

https://www.google.com/search?client=safari&rls=en&q=math+ac+method&ie=UTF-8&oe=UTF-8
*April 30, 2014*

**biology**

Since this is not my area of expertise, I searched Google under the key words "ways that DNA mutation can alter genetic material" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=ways+that+DNA+mutation+can+alter+genetic+material&ie=...
*April 30, 2014*

**algebra**

Z = (score-mean)/SD Insert values and solve for SD.
*April 30, 2014*

**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 your later post.
*April 30, 2014*

**Probability**

One parent is Bb and the other is bb. https://www.google.com/search?client=safari&rls=en&q=punnett+square&ie=UTF-8&oe=UTF-8
*April 30, 2014*

**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.
*April 30, 2014*

**Probabitilty**

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.
*April 30, 2014*

**science**

Since this is not my area of expertise, I searched Google under the key words "ocean area with few living things" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=ocean+area+with+few+living+things&ie=UTF-8&oe=UTF-8 In the future, ...
*April 30, 2014*

**Algebra 2**

Online "^" is used to indicate and exponent, e.g., x^2 = x squared. 5^4 = 5 * 5 * 5 * 5 = 625
*April 30, 2014*

**math (?)**

What is your question?
*April 30, 2014*

**math**

$154,330 * .045 = $6944.85
*April 30, 2014*

**statistics (?)**

What is your question?
*April 30, 2014*

**statistics**

A. Pairs were not matched. Sample too small for Z test. Group differences not measured by correlation.
*April 30, 2014*

**Math**

220 * 2 * $.75 = ?
*April 30, 2014*

**Math**

22,000/400 = ?
*April 30, 2014*

**math**

35 * 20 * 5 * 7 = ?
*April 30, 2014*

**statistics**

Inadequate data. 95% = mean ± 1.96 SEm SEm = SD/√n
*April 30, 2014*

**Math**

a. No, players of other sports not represented. b. Yes, it is open-ended.
*April 29, 2014*

**Statistics**

https://www.google.com/search?client=safari&rls=en&q=Tukey's+HSD+test&ie=UTF-8&oe=UTF-8
*April 29, 2014*

**statistics**

8. A 9. B
*April 29, 2014*

**science**

To keep the next generation from having double the species number of chromosomes.
*April 29, 2014*

**algebra 1**

x - 315/21 = 9 Solve for x.
*April 29, 2014*

**Math**

Assuming a normal distribution: 95% A = 1.2 ± 2 * .1 95% B = 1.5 ± 2 * .9
*April 29, 2014*

**math**

Cannot post graph here. Pick various values of x and calculate corresponding values of y. Draw your graph.
*April 29, 2014*

**Psychology**

Understanding the world around us. Does that correspond to any of your choices?
*April 29, 2014*

**math**

Multiply both sides by P and divide both sides by 300 to solve for J.
*April 29, 2014*

**Statistic in Social Science**

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(.90, .15, etc.) and related Z score. Insert into above equation and solve for score. For last two (c & d) ...
*April 29, 2014*

**statistics**

Without more data, I would also pick C.
*April 28, 2014*

**Math**

√-1 = i https://www.google.com/search?client=safari&rls=en&q=square+root+of+negative+one&ie=UTF-8&oe=UTF-8
*April 28, 2014*

**Math**

First of all, range is not a measure of central tendency. Since hours are numerical, eliminate C. However, since the data is not given, we cannot know if there are a significant number of outliers on one side (skewed distribution) or not. If so, median. If not, mean. The mean ...
*April 28, 2014*

**Science. Check Answer**

I assume you are referring to the physics definition of work. 1. W 2. W 3. N 4. W 5. W 6. N 7. W 8. W 9. W 10. N In physics, a force is said to do work when it acts on a body, and there is a displacement of the point of application in the direction of the force. For example, ...
*April 28, 2014*

**math**

a. Matched pairs c. Use the Chi-square (X^2) method. X^2 = ∑ (O-E)^2/E, where O = observed frequency and E = expected frequency. ∑ = sum of all the cells. E = (column total * row total)/grand total df = n - 1, where n = number of cells Look up value in X^2 table in...
*April 28, 2014*

**Biology**

Since this is not my area of expertise, I searched Google under the key words "functions of the skin" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=functions+of+the+skin&ie=UTF-8&oe=UTF-8 In the future, you can find the ...
*April 28, 2014*

**math question**

From your data, 63% + 9% = ?
*April 28, 2014*

**Science**

Since this is not my area of expertise, I searched Google under the key words "contribution of African elephant to world" to get these possible sources: https://www.google.com/search?client=safari&rls=en&q=contribution+of+African+elephant+to+world&ie=UTF-8&oe=UTF-8 ...
*April 27, 2014*

**Statistics**

Use data from your previous post. 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 your Z score.
*April 27, 2014*

**Statistics (?)**

Lacking data. https://www.google.com/search?client=safari&rls=en&q=cats+sleep+time&ie=UTF-8&oe=UTF-8
*April 27, 2014*

**Probability**

How does she know that she wasn't picking the same marble each time?
*April 27, 2014*

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