Abcd is a rectangle. if ac = 3y/5 anf bd= 3(y-4), find the length of each diagonal

a.) 4; ln = mp = 4
b.) 3; ln = mp = 7
c.) 1; ln = mp = 67
d.) 5/3; ln = mp = 29/3

Remember please that Diagonals of a Rectangle are equal to each other: 3y/5 = 3(y-4)
So 
3y = 15(y-4)
3y = 15y - 60
60 = 12y
y = 5 Diagonals are both 3 units
With that you will be able to know which is the answer from your options

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