The width of a rectangular mirror is 3/4 the measure of the length of the mirror. If the area is 192 in.squared, what are the length and width of the mirror?

Question

jack1 · Answer

|dw:1379612488381:dw|

jack1 · Answer

|dw:1379612515875:dw|

jack1 · Answer

Area of a rectangle = ...?  @rwhovian98 ?

anonymous · Answer

Length times width?

jack1 · Answer

sweet
and your width is 3L/4
so times it out
192 = L x W
192 = L x 3L/4 ... u finish is up

jack1 · Answer

it should finish with: L = _______

anonymous · Answer

What do you mean by times it out?

jack1 · Answer

$$192 = L \times \frac{ 3L }{ 4 } $$
$$192 =    \frac{ 3LL }{ 4 } $$ 
$$192 =    \frac{ 3L^2 }{ 4 } $$
$$192 \times 4 =    \frac{ 3L^2 }{ 4 } \times 4 $$  
$$768 =    3L^2  $$ ...

jack1 · Answer

so just finish that off until you're left with L = something
then use that to find width (W = 3L/4)

anonymous · Answer

I get it now, thanks.

jack1 · Answer

all good dude yw