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Let f(x)=3x+3. Which expression represents f^(-1)(x)?

  • (3x) – (3)
  • (x + (3))/3
  • 3/(x – (3))
  • (x – (3))/3
Correct answer(s):
    • (x - (3))/3

Let f(x)=-3x+-2. Which expression represents f^(-1)(x)?

  • (x + (-2))/-3
  • (x – (-2))/-3
  • -3/(x – (-2))
  • (-3x) – (-2)
Correct answer(s):
    • (x - (-2))/-3

Let f(x)=2x+6. Which expression represents f^(-1)(x)?

  • (x – (6))/2
  • 2/(x – (6))
  • (2x) – (6)
  • (x + (6))/2
Correct answer(s):
    • (x - (6))/2

Let f(x)=4x+1. Which expression represents f^(-1)(x)?

  • 4/(x – (1))
  • (4x) – (1)
  • (x – (1))/4
  • (x + (1))/4
Correct answer(s):
    • (x - (1))/4

Let f(x)=4x+-7. Which expression represents f^(-1)(x)?

  • (x + (-7))/4
  • (4x) – (-7)
  • 4/(x – (-7))
  • (x – (-7))/4
Correct answer(s):
    • (x - (-7))/4

Let f(x)=3x+-5. Which expression represents f^(-1)(x)?

  • (x – (-5))/3
  • (x + (-5))/3
  • (3x) – (-5)
  • 3/(x – (-5))
Correct answer(s):
    • (x - (-5))/3

Let f(x)=2x+0. Which expression represents f^(-1)(x)?

  • (x – (0))/2
  • (x + (0))/2
  • 2/(x – (0))
  • (2x) – (0)
Correct answer(s):
    • (x - (0))/2

Let f(x)=3x+8. Which expression represents f^(-1)(x)?

  • (3x) – (8)
  • (x – (8))/3
  • (x + (8))/3
  • 3/(x – (8))
Correct answer(s):
    • (x - (8))/3

Rina has x pencils and buys 4 more. Now she has 17 pencils. Which equation correctly represents the situation?

  • x + 4 = 21
  • x + 4 = 17
  • x – 4 = 17
  • 4x = 17
Correct answer(s):
    • x + 4 = 17

A bus fare is 3 taka per student. For x students, the total fare is 36 taka. Which equation correctly represents the situation?

  • x – 3 = 36
  • 3x = 36
  • x/3 = 36
  • x + 3 = 36
Correct answer(s):
    • 3x = 36

Sam’s age is x. His brother is 7 years older and is 18 years old. Which equation correctly represents the situation?

  • x – 7 = 18
  • x + 7 = 25
  • 7x = 18
  • x + 7 = 18
Correct answer(s):
    • x + 7 = 18