144k views
20 votes
A picture frame measures 18 cm by 20 cm on the outside, and 168 cm?

of picture shows.
Find the width of the frame around the picture.
The width of the frame is
cm.

A picture frame measures 18 cm by 20 cm on the outside, and 168 cm? of picture shows-example-1
User Hellen
by
4.0k points

1 Answer

10 votes

Answer:

hello

( 20 - 2 x ) ( 18 - 2 x )

= 360 - 40 x - 36 x + 4 x²

= 4 x² - 76 x + 360

Explanation:

User Ben Jarman
by
3.4k points