Hi(adsbygoogle = window.adsbygoogle || []).push({});

i am in us military and over the years i have lost my mathematical skills so picked up a book from library to solve simple equations..

i couldn't figure out few problems.. i will show you my work and then you guys can explain where i messed up. i have the correct answers but that does not matter i would like to understand the concept.

Some of these problems are elementary level but i have not done this for a while. There are no Math teachers here i can get help from so you guys are my only help, i am currently stationed in Turkey and Probably going to be in Iraq a lot from here on out.

I also try not to use the calculator because i really suck at math so harder it is better i will get at it so please just correct my simple mistake although I did check my work over but i could be wrong about most simple things.

thank you very much for your help

here are the problems

1. A = 1/2h(B1 + BA2)

Solving for H

A= 1/2ba1 + 1/2ba2

-1/2ba1A = 1/2ba2

----------------------

-1/2BA1A -1/2BA1A

H = - hB2 / B1A

thats what i got but its wrong

correct answer in the book is =2a / B1 + B2

I tired it several times please explain step by step how to arrive at the correct answer.

2. 1x + 2(1/6x + 2) = 6/5x + 16

Solve for X 90

1x + 1/3x + 4 = 6/5x + 16

4/3x = 6/5x + 12 <-- i think i messed up here somewhere in the fractions i am not good with those.

4/3x - 6/5x = 12

some How X = 90 in the book

i got stuck at this problem so i need help on this one too..

i suck at fractions i am reviewing that right now.

I didn't know how to make that PIE symbol on this so i wrote "#"

Also on this one i know its a minor mistake because i probably forgot how to divide or multiply a fraction or exponintial value.

# = pie

3. v= 1/3#*h^2(3R-h)

Solve for R

V= 3R*1/3#*h^2 - 1/3#*h^3

V + 1/3#*h^3 = 3R*1/3#*h^2

------------- -------------

1/3#*H^2 1/3#*h^2

V + h^1 = 3R

------- ---

3 3

R = v + h^1

--------

3

Correct answer in the book is

R= v + 1/3#*h^3 3v + #*h^3

------------- = -----------

#*h^2 3*#*h^2

you can explain much as you like more the better

thank you

Max

**Physics Forums - The Fusion of Science and Community**

# My problems.. my work.. my wrong answers... HELP!

Know someone interested in this topic? Share a link to this question via email,
Google+,
Twitter, or
Facebook

- Similar discussions for: My problems.. my work.. my wrong answers... HELP!

Loading...

**Physics Forums - The Fusion of Science and Community**