Evaluate 2xy when x = -1/4 and y = 3

-1.5

Step-by-step explanation:

2(-1/4)(3)

=-1.5

You replace x with -1/4 and y with 3 inside of parenthesis

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area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2