The length of AD from the figure is 47 units
Perimeter of a rectangle
The formula for calculating the perimeter is given as:
P = 2(l+w)
Substitute the sides
P = 2(4y+5y+2)
158 = 2(9y + 2)
79 = 9y - 2
9y = 81
y =9
Determine the length of AD
AD = 5y + 2
AD = 5(9) + 2
AD = 47units
Hence the length of AD from the figure is 47 units
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