Carol has 3 children. the youngest child is 4 years younger than the middle child. the oldest child is 6 years older than the middle child. the youngest child is 8. the sum of their ages is 12 years less than carol's age. how old is carol?

let c = carol's age; y = youngest child.

a) c=y+(y+4)+(y+4+6)+12
b) c=y-(y--4-6)-12
c) c+12=y+(y+4)+(y+4+6)
d) c=y+(y-4)+(y-4-6)+12

a framing bias

step-by-step explanation:

rodrigo is subject to a framing bias i believe.

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.