Rational numbers + second power - practice problems

Number of problems found: 6

  • Fraction function
    If Begin equation . . . y equals . . . begin fraction . . . x raised to the second power minus 3 times x plus 10 . . . over . . . x plus 4 . . . end fraction . . . end equation, find f(5).
  • Cubic
    Convert 1503 m³ of natural gas volume to energy units kWh. Combustion of 1 cubic meter of natural gas is released energy 10.55 kWh.
  • Car factory
    The carmaker now produces 2 cars a day more than last year, so the production of 70312 cars will save just one full working day. How many working days were needed to manufacture 70312 cars last year?
  • Factors
    Can the expression 4x ² -47.6x +39.6 be factored into rational factors?
  • Rectangular cuboid
    The rectangular cuboid has a surface area 4131 cm², and its dimensions are in the ratio 2:4:5. Find the volume of this rectangular cuboid.
  • Efficiency
    A certain device consumes 50 kW and delivers 17 kW. Find its efficiency.

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