SOLUTION: a picture frame is 20cm by 12cm. there are 84cm (to the second power) showing. find the width of the frame

Question 82612This question is from textbook Algebra 1
: a picture frame is 20cm by 12cm. there are 84cm (to the second power) showing. find the width of the frame This question is from textbook Algebra 1

Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
20X12 cm are the outside dimensions of the frame
84 cm2 is the area of the frame
Call the width w
divide the top bottom and 2 sides into strips

rearranging

divide both sides by 4

where , ,

and

The 1st answer doesn't make sense, so pick the 2nd

cm answer
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