A student says x^2 + x^3 = x^5. What is the mistake?

  • The bases are different
  • Unlike powers were added as if multiplying
  • Unlike powers were added as if multiplying


What type of equation is 3(x – 3) = 3x – 9?

  • One solution only
  • No solution
  • Identity: true for every value of x
  • Identity: true for every value of x

The length of a rectangle is 5 cm more than its width. If the perimeter is 54 cm, what is the width?

  • 11 cm
  • 16 cm
  • 13 cm
  • 11 cm