Use the formula to answer the question.

A=lw

What is the value of P if A = 40 ft2 and a = 8 ft?
(Points : 1)
0.4 ft

2.5 ft

10 ft

160 ft

Question

Use the formula to answer the question.

A=lw

What is the value of P if A = 40 ft2 and a = 8 ft?
(Points : 1)
       0.4 ft

       2.5 ft

       10 ft

       160 ft

anonymous · Answer

Sory I mean to put for the formula, A=1/2aP

anonymous · Answer

40=1/2(8)?

opcode · Answer

Okay, now this makes more sense.

@vzfreakz you are correct, but you forgot the P...

opcode · Answer

It is:
$$40 = \frac{1}{2}(8)P$$

anonymous · Answer

Yes, that is correct. where do I go from this point?

opcode · Answer

Do you know how to start to isolate $P$?

anonymous · Answer

No sir.

opcode · Answer

Okay, well what we need to do is isolate $P$.

$40 = \frac{1}{2}(8)P$ is our equation.

First let use do the simple arithmetic operations:
$$\frac{1}{2} \times (8) = ?$$

Do you know what $?$ equals?

anonymous · Answer

4

opcode · Answer

Correct! @vzfreakz 

Now since you know that, $\frac{1}{2}(8) = 4$ rewrite the original equation to be:
$$40 = 4P$$

Do you know what we do next from here?

anonymous · Answer

Yes, just divide from here. Correct?

anonymous · Answer

Answer is 10.

opcode · Answer

Correct, $40 \div 4 = 10$.
So: $$P = 10$$

anonymous · Answer

I also have one a question but can't work on it for long.

anonymous · Answer

http://openstudy.com/study#/updates/53ffe1bce4b091be176ff501