SOLUTION: A picture is 4cm by 6cm. it is pasted onto a matter of equal width on all sides. What is the width of the matte if the area of the matte is 3 times as great as the area of the pict
Algebra ->
Surface-area
-> SOLUTION: A picture is 4cm by 6cm. it is pasted onto a matter of equal width on all sides. What is the width of the matte if the area of the matte is 3 times as great as the area of the pict
Log On
Question 1029036: A picture is 4cm by 6cm. it is pasted onto a matter of equal width on all sides. What is the width of the matte if the area of the matte is 3 times as great as the area of the picture? Answer by ikleyn(52781) (Show Source):
You can put this solution on YOUR website! .
A picture is 4cm by 6cm. it is pasted onto a matte of equal width on all sides. What is the width of the matte
if the area of the matte is 3 times as great as the area of the picture?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Your guiding equation is
(2x+4)*(2x+6) = 3*4*6, or
(2x+4)*(2x+6) = 72,
= ,
= ,
= .
Use the quadratic formula and get
x = .
