Study

8LA Review

  •   0%
  •  0     0     0

  • Simplify -3x(3-4x) = -9x + 12x^2
    -9x + 12x^2
  • (3x+8)(5x-9)
    15x^2 +13x - 72
  • 108 identical book have a mass of 30 kg. Find the mass of 150 books.
    41 2/3 kg
  • Use Elimination method to solve 7x - 2y = 21 and 4x +y = 57
    x = 9 and y = 21
  • - x +2y = 4 is a line. (r, 0.5) lines on the graph. Find the value of r.
    -3
  • If x is directly proportional to y^3 ad x = 32 when y = 2. Find the Equation connecting x and y.
    x = 4y^3
  • Give the equation for this graph.
    y = 9
  • Give the coordinates of the intersection.
    (2,2)
  • Factorise 4u^2 - 8u -21
    (2u+3)(2u-7)
  • Expand (5n - 4)^2
    25n^2 - 40n + 16
  • Solve the equation x(x+6) = -5
    x is -1 or -5
  • What are the coordinates of the maximum point and give the equation for the line of symmetry.
    (-2, 4) x = -2
  • Expand (2x+7)^2
    4x^2 + 28x + 49
  • Give the equation of this line.
    x = 3
  • Eight men can build a bridge in 12 days. Find the time taken for 6 men to build the same bridge. 16
    16 days
  • Use the elimination method to solve 3x-y= 12 and 2x +y = 13.
    x=5 an y =3
  • What is the value of y in the equation 2x -3y = 2, when x = - 0.5
    y -1
  • Factorise x^2 - 7x +12
    (x-3)(x-4)
  • If x is inversely proportional to y and x = 40 when y = 5. Write the equation connecting x and y.
    x = 200/y