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faltersainse [42]
3 years ago
8

The area of the postcard is 24 square inches. What is the width b of the message (in inches)?

Mathematics
1 answer:
MAXImum [283]3 years ago
4 0
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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