Sunday

November 23, 2014

November 23, 2014

Posted by **Jane** on Tuesday, January 10, 2012 at 10:51am.

The problem is: A = 1/2bh, which is not correct?

Choices: 2A =bh, b=2A/b, 2b=A/h, b=2A/h

When I got my test back 2b=A/h was correct. Did I make a mistake or was their answer incorrect?

- Math -
**Reiny**, Tuesday, January 10, 2012 at 11:01amtake the original true equation

A = (1/2)bh

then 2A = bh is the true statement after multiplying each side by 2

now take each of the answers and simplify by cross-multiplying

1st is obviously correct

2nd: b = 2A/b ---> b^2 = 2a , incorrect

3rd: 2b = A/h ----> 2bh = A, incorrect

4th: b = 2A/h ---> bh = 2A, correct

The way you typed it, there are two incorrect.

Do you have a typo in the 2nd ?

**Answer this Question**

**Related Questions**

math - Sorry, Reiny, I copied the 2nd choice incorrectly. I had posted this ...

Math - I posted this problem the other day and someone answered it but when I ...

math,drbob222 - I'm sorry the problems i posted had a couple of errors how i ...

Math - I have 2 problems I need help with both I have narrowed it down to 2 ...

Algebra I - Question:The number of students on the football team is two more ...

Math - 1.2 (1+ 23.0 x 10-6/°C*50) Could someone solve this problem for me and ...

math,correction - Can someone correct these for me plz... Problem#6 Factor. x(x-...

Algebra - The answer in the book however says -(5x^2-17x-9)/(x-3)(x+2) so I don'...

Chemistry - I am working on a problem that was posted January 20. Can someone ...

Math - I am given 4 choices for the problem the square root of 8x -2 = the ...