A triangle has side lengths of (6.5r + 4.2) centimeters, (2.4r – 9.8) centimeters, and (9.5s - 5.2) centimeters. Which expression represents the perimeter, in
centimeters, of the triangle?

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

Which expression is equivalent to -5(3x - 6/7)