16. the sum of 1/6, 2/3, and 1/4 is

a. 13/12, or 11/12.
b. 2/72, or 1/36.
c. 4/12, or 1/3.
d. 11/12.

mark

13/12

For addition of fractions make the denominators the same, carrying that through to the numerator. Then add the numerators together and the denominator will be what was made the same. Then simplify if needed.

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

salary

step-by-step explanation: