Evaluate 4y when y = 15

60

Step-by-step explanation:

When you substitute 15 in for y, you get the equation 4(15) which is the same as 4×15. And 4×15=60. Hope this helps! :)

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.