The length of a rectangle is 7 cm more than its width. If the perimeter is 30 cm, what is the width?

  • 7 cm
  • 11 cm
  • 4 cm
  • 4 cm



A student solves 3(x + 4) as 3x + 4. What is the mistake?

  • The plus sign should become minus
  • The 3 was not multiplied by 4
  • There is no mistake
  • The x should be divided by 3
  • The 3 was not multiplied by 4


What type of equation is 6x – 3 = 6x – 1?

  • One solution: x = 0
  • One solution: x = 2
  • Identity: true for every value of x
  • No solution
  • No solution

The length of a rectangle is 2 cm more than its width. If the perimeter is 36 cm, what is the width?

  • 10 cm
  • 9 cm
  • 18 cm
  • 8 cm
  • 8 cm