What is the pattern in this sequence? 18,11,4,−3,− select from the drop-down menus to correctly complete the rule. blank 1 options: a. add b. multiply by c. subtract d. divide by

each time they are subtracting 7 , so the answer would be c.subtract

Step-by-step explanation:

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