Thursday
April 17, 2014

Posts by kathleen


Total # Posts: 120

Chemistry
What is the importance of a freezing point depression graph and why and what things change when different solutes and solvents are added?

Algebra
The numbers are represented by x, x+1 and X+2. X^2 + (X+1)^2=(X+2)^2 X^2 + X^2 +2X +1=X^2 +4X + 4 2X^2+2X+1=X^2+4X+4 X^2-2X-3=0 (X-3)(X+1)=0 X=3 X=-1 The numbers are X=3, X+1=4 X+2=5 Check: 3^2 + 4^2=5^2 9+16=25 A second solution is X=-1 X=0 X=1 -1^2 + 0^2=1^2 1+0=1

algebra
Divide 7 by 12 to get the decimal. 7/12=0.5833 (3 repeating) Multiply by 100 to get percent. 58.33% (3 repeating)

Chemistry
THANKS!

Chemistry
Thanks! So the antifreeze one doesn't have anything to do with vapor pressure?

Chemistry
What colligative properties are displayed by these situations. 1. Antifreeze is added to car cooling system preventing freezing when air temp is below 0 degrees C. 2. Ice melts on sidewalk after salt has been spread

algebra
X^-6 times X^5= X^-1 (add exponents -6 + 5=-1 X to the negative 1 can be rewritten 1/X so you have only postitve exponents. Y^-12 divided by Y^5 = Y^-17 (subtract exponents -12-5=-17) So Y^-17=1/Y^17

Science
The half life of carbon 14 is 5700 years. So If a fossil is 5700 years old then half of the carbon-14 is left.

Algebra
what is the solution to 2(-5y cubed)squared + (-3ycubed)cubed

Child care
#. additional space for children could provide in classoom 3 with the additional of A. a closet B. counters and storage underneath c.cubbies D. a loft

social studies
Why does the President as commander-in-chief of the armed forces?

science
What is one animal that lives in the rainforest and what is it's adaptation?

science
I guess I'm missing something here...but I've approached this question in every possible angle and im just not getting it! Could somebody point me in the right direction? Here is the question: If the measured net radiation (Q*) for the lawn of your home in August is 70...

science
what is faster panther or cardinal

spelling
Umm... Maybe: She's going to buy him a present, but can't decide what to get him. Maybe something along those lines? I don't know if that works or not.

Math
Divide: 4 1/5 / 14

Math
Multiply: (7.6)(1)(6)

Alegebra II
if 3ãx6 + 3ã8x3 + 3ã1 = 0, then x= (A) -1 (B) 0 (C) 1 (D) 2 (E) 3

science
name each ion 1. As3- 2. Ca2+ 3. H- Since this is not my area of expertise, I searched Google under the key words "H- ion", As3- ion" (Sure you don't mean "+"?) and Ca2+ ion" to get these possible sources: http://www.h-minus-ion.org/ http://en...

5th Grade Math
I cannot get my brain around questions like this: 1/4 divided by 2/5 = 2/4 x ? I have 4 problems like this and even the example doesn't make sense - I may have copied it wrong off of the board. Can anyone help? Thank you! You invert the second fraction and then just multip...

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