Question

Can someone help me and check my work, I'm very confused...

Solve P = 2(l + w) for l. What are the missing values in the table?

My work:

l=(p /(2-w))

P=14
w=2
(14/(2-2))
How am I supposed to divide by 0?

Answer 1

\[P=2(l+w)\]
\[P=2l+2w\]
\[P-2w=2l\]
\[l=\frac{ P-2w }{ 2 }\]
Substituting P=14 and w=2,
\[l=\frac{14-2(2)}{2}\]
\[l=\frac{14-4}{2}\]
\[l=\frac{10}{2}\]
\[l=5\]

Answer 2

You were smart to question the division by 0. Start by multiplying everything out. Your initial l = has a flaw. You need to see that to avoid doing it again.

Answer 3

oh, I see now!! thank you very much! c:

Answer 4

your welcome :)