Posts by walter

Total # Posts: 122

arithmetic math
For each of the following expressions, show each step a student would folow to mentally perform the calculations in the whole numbers. For each step, identify the law, definition , axiom ec that was used to roduce that step. 345+641+255+359

basic math
say i have something like (2/3)-(1/3) ---------------- 3 do i multiply the top this way (1/3)(3/1) by flipping the denominator or multiply it like this (1/3)(1/3)

trig
Work out the following identities a)sin pheta / cos pheta b)tan pheta cos pheta

trig
If a = 5 cm and b = 3cm, use the Pythagorean Theorem to find c

chemistry
Given the equilibrium system PCl5(g) <---> PCl3(g) + Cl2(g) K = 12.5 at 60 degrees Celsius. A 1.0-L reaction vessel is analyzed and found to contain 3.2 mol Cl2(g), 1.5 mol PCL3(g) and 3.0 mol PCl5(g). Show that the reaction mixture has not yet reached equilibrium

Accounting question..
Having trouble figuring out how to do this problem for my accounting homework.. any help would be greatly appreciated..the information given goes as follows.. On 1/1/08 you issue $400,000 of 7%, 10 year bonds that pay intrest semiannually. The Market intrest rate is 8% The ...

maths
solve for x 8=6^x using logs

maths
solve for x

maths
solve the following equation for x

algebra
can you show how to solve for x x+1/x + 6/2x-3 =0

maths
factorise the following equation 680x3-1407x2-614x+285 where x2 x3 mean x to the power of

maths
solve the following equation for x (x+1/x) + (6/2x-3)=0

maths
rearrange the following equation to find x in terms of y and t y(y-x)=3t(3t+x)

algebra
solve the following simultaneous equation algebraically,for a and b 8a+5b=23 12a+3b=12

chemistry
if you added sulfuric acid to calcium nitrate what products in addition to calcium sulphate would you get if any ? if you start with calcium nitrate mixed into H2SO4 (aq), wouldn't you get a solution of nitric acid? H2SO4 + Ca(NO3)2 >>> 2 HNO3(aq) + CaSO4(s)

chemistry
write a balanced chemical equation for calcium nitate plus sulfuric acid produces calcium sulphate and ? This is a metathetical reaction, I think more properly called a double displacement reaction now. Just change + and - partners. Ca(NO3)2 + H2SO4 ==> CaSO4 + HNO3. I will...

chemistry
Given a solution in moles per litre how would you convert to parts per million)ppm.) could you help,no other information given apart from solution contains a known concentation of aluminium mols/L. Convert mols to grams. That will be grams per 1000 mL. Convert that to mg/L. ...

chemistry
calcium nitrate + sulfuric acid =caso4+? write a balanced chemical equation for this reaction including states. Ca(NO3)2 + H2SO4 ==> CaSO4 + 2HNO3 You don't have enough information to provide states. CaSO4 will be a solid so you write CaSO4(s). H2SO4 will be (l) if it ...

chemistry
write a balanced chemical equation for the following reaction including states not complete; no question.

Math
Show me how to solve problems like this. 1.) 7 + (-9) + (-5) + 6 2.) [(-3)(-4)(-5)]/ (-2)(-3)] Try reading the following sites' pages very carefully. Then make an attempt at doing the problem, and we'll see if you got it right: http://www.jiskha.com/mathematics/algebra...

math proportions
17/32 = x/100 1700 = 32x x= 53 1/8 Am I right? yep

Proportional Lengths--Desperate for help!!!
The lengths in the figure are proportional. In the first figure- 3 on top, and 2 on the bottom In the second figure- 4 1/2 on top, and x on the bottom These are the choices that are written on my assignment. One is the correct answer. A. 4 1/2 B. 3 C. 2 1/2 D. 2 I tried ...

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