Thursday

April 24, 2014

April 24, 2014

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 3ãx6 + 3ã8x3 + 3ã1 = 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...