Considering the definition of an inequality, the number of minutes she will run today will be more than 72 minutes.
Definition of inequality
An inequality is the existing inequality between two algebraic expressions, connected through the signs:
- greater than >.
- less than <.
- less than or equal to ≤.
- greater than or equal to ≥.
An inequality contains one or more unknown values called unknowns.
Solving an inequality consists of finding all the values of the unknown for which the inequality relation holds.
Inequality in this case
In this case, you know that:
- Raina runs each lap in 8 minutes.
- She will run more than 9 laps today.
Being "t" the number of minutes Raina will run today, the inequality is
t÷ 8> 9
Solving:
t > 9×8
t > 72 minutes
Finally, the number of minutes she will run today will be more than 72 minutes.
Learn more about inequality:
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