The area of the postcard is 24 square inches. What is the width b of the message (in inches)?
1 answer:
Area of rectangular post card = length x width For the given post card: length = 4 in width = (3+b) in area = 24 in^2 So, substituting in the equation of the area: 24 = 4 x (3+b) 24 = 12 + 4b 24 - 12 = 4b 12 = 4b b = 3 in Therefore: the length of the postcard = 4 inch the width of the postcard = b+3 = 3 + 3 = 6 inch
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