Answer:
see explanation
Step-by-step explanation:
Using the proportionality theorem
(a)
[tex]\frac{3x-5}{10}[/tex] = [tex]\frac{20}{8}[/tex] ( cross- multiply )
8(3x - 5) = 200 ← distribute left side
24x - 40 = 200 ( add 40 to both sides )
24x = 240 ( divide both sides by 24 )
x = 10
(b)
3x - 5 = (3 × 10) - 5 = 30 - 5 = 25
Hence
Perimeter = 10 + 25 + 28 + 16 = 79
