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2.2. Constructing expressions

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  • a. adds 15 to the number
    y + 15
  •  15
  • b. subtracts 8 from the number
    y - 8
  •  15
  • c. doubles the number then subtracts 5
    2y - 5
  •  15
  • d. triples the number then adds 20
    3y + 20
  •  15
  • e. squares the number then subtracts 7
    y^2 - 7
  •  15
  • f. divides 50 by the number
    50 / y
  •  15
  • g. multiplies the number by 4 then divides the result by 3
    4y / 3
  •  15
  • h. takes the square root of the number then adds 2
    sqrt(y) + 2
  •  15
  • i. cubes the number then subtracts 10
    y^3 - 10
  •  15
  • j. cube roots the number then multiplies the result by 6
    6∛y
  •  15
  • k. subtracts 9 from the number squares the result then adds 12
    (y - 9)^2 + 12
  •  15
  • l. triples the number cubes the result then subtracts 200
    (3y)^3 - 200
  •  15
  • m. halves the number then adds 5
    y / 2 + 5
  •  15
  • n. subtracts 12 from the number then doubles the result
    2(y - 12)
  •  15
  • o. squares the number then adds 25
    y^2 + 25
  •  15
  • p. multiplies the number by 5 then subtracts 40
    5y - 40
  •  15