# 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 ...