Mathematics
Grade10
Easy

Question

Write an inequality to represent the following:
Phil wants A grade on his math test. He needs at least 90% marks.
Let x represent the grade Phil gets on his test.

  1. x > 90    
  2. x ≥ 90    
  3. x < 90    
  4. x ≤ 90    

Hint:

We are given a statement. We have to write the expression of inequality for the given statement. We have to see the limits given for the required value.

The correct answer is: x ≥ 90


    The given statement is as follows:
    Phil wants A grade on his math test. He needs at least 90% marks.
    The variable x represents the grade Phil get on his test.
    Phil needs at least 90% marks means, this is the minimum limit of the marks he need to get A grade. He can get any marks above 90% or 90%. But, the marks shouldn’t be below 90 %.
    So, the variable x can be greater than or equal to 90%.
    The sign for greater than or equal to 90% is “≥90%”
    The mathematical representation of the inequality is as follows:
    x ≥ 90%
    This is the given inequality.

    For such questions, we have to be careful about the limits.

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