Carol is 4 years younger than her brother, Vishu. let c = Carol age and v = Vishu's age. a( c = v - 4
b( c = 4v
c( c = v ÷ 4
d( c = 4 + v

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Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

Joe has a rectangular chicken coop. the length of the coop is 4 feet less than twice the width. the area of the chicken coop is 510 square feet. what is the length of the chicken coup?