SOLUTION: A length of the photograph is 7 cm longer than the width. Its area is 30 cm^2. Find the length and the width.
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Question 544706: A length of the photograph is 7 cm longer than the width. Its area is 30 cm^2. Find the length and the width.
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
area=length times width
A=30
L=7+w
find two numbers that multiply to get -30 and add to get +7: +10 and -3, 10(-3)=-30, 10-3=7
solve
width cant be negative
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