Posted by **ASDFGHJKL;** on Thursday, November 10, 2011 at 5:00am.

A = h/2 (a+b)

the subject of the given formula is "a" not "A"

please include workings (along with solution) thanks

- Math -
**ASDFGHJKL;**, Thursday, November 10, 2011 at 5:02am
this topic that i learned in class is "changing the subject of a formula" FYI

- Math -
**drwls**, Thursday, November 10, 2011 at 5:11am
Use algebra to derive the formula for a in terms of h, A and b.

You should use parentheses to show if (a+b) is part of the denominator of a fraction h/[2(a+b)], or not. I will assume you mean

A = (h/2)*(a+b)

a + b = 2A/h

a = 2A/h -b

- Math -
**ASDFGHJKL;**, Thursday, November 10, 2011 at 5:15am
God bless you. Thanks!

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