Question

Jon's new mini computer monitor has a 20 cm by 24 cm LCD screen with a plastic trim border. The total area of the monitor and border is 672 cm2. How wide is the trim around the monitor?

Answer 1

-36 = -1 + 5x

Answer 2

How?

Answer 3

that seems extremyl wrong to me

Answer 4

this is basic math..... you can do it saif

Answer 5

im getting 4.
how about it?

Answer 6

of course your getting 4

Answer 7

is it correct?

Answer 8

(24+w)(20+w)=672
480+44w+w^2=672
w^2 + 44w - 192 = 0
(w+48)(w-4) = 0
w = -48 or w = 4
we will neglect the negative value,
So, w = 4