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Home >All Categories > Science & Mathematics >Biology >Open Question Kristy Member since:November 16, 2009Total points:340 (Level 2)1: Discuss how the concept of horizontal gene transfer relates to bacteria. Include the following in your discussion:
bacterial mechanisms of horizontal gene transfer and how they differ from normal inheritance
the importance of horizontal gene transfer to the treatment of bacterial infections
the effects this concept has on evolutionary relationships inside and outside the bacterial domainAnswer Question

by Jack Martin Member since:March 22, 2011Total points:129 (Level 1)I'll do your homework for $50...

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1.) (3x – 2y)^2 =

2.) If x > 2, then x^2– x – 6 over x^2 - 4=

3.) 4 – (-6) over -5 =

4.) If 2x – 3(x + 4) = - 5, then x =

5.) – 3(5 – 6) – 4(2 – 3) =

I know, it's elementary algebra and it's bad I can't even solve 'em, I just don't remember how too!
It's not for homework, it's for a placement test. So any help will do. Thank you!

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Y^2 = 3*(x^3)*sinx
Y= v(3*(x³sinx))
= (v3) (x^(3/2)* (sin^½x)

U=x^(3/2); V = sin^(½)x

Dy/dx= v3(U.V' + VU')
= v3[x^3/2*½ (sin^-½x)cosx + sin^(½)x*(3/2x^½)]

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The problem is to subtract and simplify. . .

3 / (x^2+4x-5) - x / (x^2-1)

In the end I got . . .

(-x^2-2x+3) / (x+5)(x-1)(x+1)

If I'm wrong, can you show me how to do it please?
Thanks alot ! : )

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Home >All Categories > Science & Mathematics >Mathematics >Open Question .... Member since:March 28, 2011Total points:13 (Level 1)You are offered 2 jobs selling college textbooks. One company offers an annual salary of $25,000 plus a year-end of 1% bonus of your total sales. The other company offers an annual salary of $20,000 plus a year-end bonus of 2% of your total sales. How much would you have to sell in a year to make the second offer the better offer?Answer Question

Be the first to answer this question.

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Home >All Categories > Science & Mathematics >Geography >Open Question Tootie Member since:May 15, 2009Total points:0 (Level 1)Bangladesh's principal problem preventing desired progress toward much better economic development is its:
A. Population distribution
B. Decision to sell the recently discovered natural gas rather than invent it in domestic consumption
C. Religion
D. Physical geography and dangerous natural hazardsAnswer Question

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well i asked my teacher and she told me to sit back down and reread it, i already did like 10 times! but i still don't understand so please work everything out and please explain to me step by step thanks :)

1) The ratio of the angle measures of a triangle is 7:16:22. Find the angle measures. Then classify the triangle by its angle measures.

2) Plot the points A(6,3), B(-3,9), and C(-3,-3) in a coordinate plan. (i already did plot it) Connect the points to form a triangle. Use the distance formula to find the side lengths. Then classify the triangle by its side lengths.

3) The triangle inequality theorem states that the sum of the lengths of any two sides of a triangle is greater than the length of the third side. Using this theorem, determine if the given side lengths from a triangle. Explain you reasoning.
A) 4,5,10
B) 4,5,9
C) 4,5,7

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Mass of KxFe(C2O4)y · zH2O : 3.58 g
Mass of sample : 0.161 g
Mass of FeCl3 used in preparation : 1.60 g
Molarity of standard NaOH used : 0.0990
V1, volume of standard NaOH required for first equivalence point : 8.700 mL
V2, volume of standard NaOH required for second equivalence point : 17.70 mL

Calculate the mass of potassium in the sample

thanks so much

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7x+4+4x+9=90
11x+13=90
11x=77
x=7

A=7(7) +4= 49+4=53

B=4(7) + 9=28+9=37

If T and U are complementary then

16x-9+4x+3=90
20x-6=90
20x=96
x=4.8

T=16(4.8) - 9=76.8-9= 67.8

U=4(4.8) + 3= 19.2+3= 22.2

hope that helps :)

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1) log(base2)(x+2)=6-log(base2)(x+14)

2) log^x+7 -log2=log(x-5)-log8

3) log(base3) (2*3 exponent3 -1)= -1

4) log (X on squared + X - 2) = 1

5) log x + log(x-3)
--------------- = 2
log( -x+6)

6) log(x+3) + log(x-3)=log7

7) log(base x+2) (5x+6)=2

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need help to solve theses problems
1. divide (30b^3+20b^2+35b+47)/(5b+5)

2. use the FOIL method to find (5x^2-3)(x^5-5)

3.find the constant when y=18 and x=3

4. multiply ans simplify 49b^2/3b^2-12b+12 x 3b-6/7b

5. find the vertex, line of symmetry and the f(x) value. f(x)=1/5(x+4)^2+7

keep getting the wrong ansers. can you please solve and show me the steps????/

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Home >All Categories > Science & Mathematics >Chemistry >Open Question Brooke Theron Member since:October 29, 2010Total points:1 (Level 1)Safety was an important factor when doing the tests, as we were working with substances that were dangerous as some of the chemicals were high risks. For example, 2,4 dinitrophenylhydrazine and potassium dichromate as they are toxic which is why they are dangerous. But we tried to make it a low risk by making sure that goggles and gloves were worn. Another problem we came across was the unpleasant odour of some of the chemicals, such as aldehyde and ketone, but to make sure it did not effect out tests, we make sure the windows were open to keep the area ventilated. Some chemical were flammable and splint test used; for example, propanone, ethanol, ethanol and cyclohexane alkene. We made sure that goggles, gloves and protective clothing were worn to reduce the risk of individuals getting on fire. The precision of the tests were not reliable, as we could have used the pipettes to measure the amount of chemicals put into the beakers rather than using the drops to make it more reliable. There would have been no precisions to be made during this experiment because the changes were obvious. But we could have used a pipette for transporting a measured volume of substance. The other test that could have been done was mass spectroscopy, which uses the spectroscopy to determine the masses of small electrically charged particles.Answer Question

by Good Luck Chuck Member since:February 22, 2011Total points:665 (Level 2)Your good just spell check and your good to go. Good Luck

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Presentation is incorrect due to lack of brackets.
Will GUESS that you may be meaning :-
(-3/7) p = 5/12
- 36 p = 35
36 p = - 35
p = - 35 / 36

It looks as if there might be another question here that could read as :-
y + 3 - 17 = y - 14

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1.Which of the following barium salts should dissolve in a strong acid such as HCl: Ba(OH)2, BaSO4, or BaCO3? Can you explain why please?

2.The cations Ba 2+ and Sr 2+ can be precipitated as very insoluble sulfates.BaSO4 (Ksp = 1.1x 10-10) SrSO4 (Ksp 3.4 x 10-7)

a) If you add sodium sulfate to a solution containing these metal cations, each with a concentration of 0.10 M, which is precipitated first, BaSO4, or SrSO4?

b) What will be the concentration for the first ion that precipitates when the second, more soluble salt begins to precipitate?

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I know how to get the first answer, but then how do I get the next two....

A roller coaster car with a mass of 225.1 kg starts from a height of 102.3 meters above the ground just before rolling down the frictionless track. Using conservation of energy, find the speed of the car just as it reaches the ground.

After the car reaches the ground, it travels horizontally on the track, where a frictional force of 836.3 Newtons slows the car to a stop. What is the work done on the car in bringing it to rest?

How far will the car go before it comes to rest?

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14x^3 - 21x

there is a common factor of 7x

7x(2x^2 - 3)

8x^2 - 4x = 4x(2x - 1)

36w^3 - 9w) = 9w(4w^2 - 1) = 9w(2w + 1)(2w - 1)

Check by multiplying.

Read your textbook. Practice. See your teacher---these were very easy !

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Sorry, I could not read the content fromt this page.

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Sorry, I could not read the content fromt this page.

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i need help with Standard deviation

and not with the slopes or whatever say they had

(21-36.6)^2 + (23-36.6)^2 + 35-36.6)^2 + (35-36.6)^2 + (26-36.6)^2 + 40-36.6)^2 + (51-36.6)^2 + (52-36.6)^2 / 8

= 11.27

how in the world did they get that answer? i got something wayyy wrong

please and ty ty ty o and it deff not a quiz or exam its in the lesson and ive researched even on youtube

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I've been out of math for a while but for #1..use the FOIL method.
F=first
O=outside
I=inside
L=last

(a+2)(a+2)
=a(a)+a(2)+2(a)+2(2)
=a2(squared)+2a+2a+4
=a2+4a+4

I hope I helped! Good luck!

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