PLZ HELP ME WITH THIS Which set of ordered pairs represents a function?
{(-1, 1), (9, -3), (9, -1), (-8, 2)}
{(-9, -5), (2, -1), (1, 5), (2, 0)}
{(6, 6), (4, 6), (-1, 1), (-4, 0)}
{(−5,−3),(−5,8),(4,2),(−7,−8)}

How are sas and sss used to show that two triangles are congruent?

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.