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The area of a rectangle is 45 square inches. One dimension is 5 inches. What is the perimeter?

Respuesta :

irspow
a=xy

y=a/x, a=45 and x=5 so

y=45/5

y=9

p=2(x+y), and we know that x=5 and y=9 so

p=2(5+9)

p=2(14)

p=28 in
width * length = 45   = area

lets let the width = 5 
5 * length = 45
length = 45/5 = 9

so perimeter = 2w + 2L  = 2(5) + 2(9)  =  28

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