Answer:
42.6cm
Step-by-step explanation:
The sum total of all the sides of the shape is the perimeter of the shape. Hence;
Perimeter = x+3 + 4 + x+9 + 2x+5
Perimeter = 4x + 21
Given
Area of the figure = 75cm^2
Area = (x+3)(2x+5) + (2x+1)(6)
75 = 2x²+5x+6x+15+12x+6
75 = 2x²+23x+21
2x²+23x+21-75 = 0
2x²+23x-54 = 0
x = -23±√23²-4(2)(-75)/4
x = -23±√529+600/4
x = -12±√1129/4
x = -12+33.6/4
x = 21.6/4
x = 5.4
Recall that;
Perimeter = 4x+21
Perimeter = 4(5.4) + 21
Perimeter = 21.6+21
Perimeter = 42.6cm
Hence the perimeter is 42.6cm
You should use paper to help this but you gotta make 1 1/4 into an improper fraction start at 3/4 then whatever you get as a improper fraction move it towards that space for example if you get 5/4 you move 5 spaces to your right since your working with positive not negative! I hope this helps you out
B) 64 cm because 8+8+8+8+8+8+8+8, also known as 8x8=64
The answer is 153.86:
if we round the answer it will be
153.9
3.124
3 + 0.100+ 0.020 + 0.004
