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JSCE Mathematics 2023 Objective — Question 76

Question 76 of 80 from the Junior Secondary Certificate Examination (JSCE) Mathematics 2023 Objective paper, with the correct answer and a full explanation.

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If the relationship between the total cost of buying the material, y, and the number of days, x, is graphed in the xy-plane, using the equation 3x − y = 6. What is the cost of buying a material for 22 1/3 days?

  • A. N40.20
  • B. N56.10
  • C. N72.00
  • D. N61.00Correct

Explanation

y = 3x − 6 = 3(67/3) − 6 = 67 − 6 = N61.00.

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