# how do open drains get choked

a) sum of the squares of a and b

b) The sum of x,y,z subtracted from the product of x and y.

c) one-third of the sum p,q and r.

d) The product of a and c subtracted from the product of 5 and a

a) sum of the squares of a and b

b) The sum of x,y,z subtracted from the product of x and y.

c) one-third of the sum p,q and r.

d) The product of a and c subtracted from the product of 5 and a

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