Savannah wanted to add 24 silver beads to the
edge of her roof. It costs
$3.50 for 12 beads. How
much money will 24 beads
cost?

it will cost 7.00 dollars for 24 beads trust me

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.