Amaya's test scores in algebra 1 are 78 and 91. she has one more test left and wants to earn a b for the course, which is from 80-89 inclusive. write a compound inequality to represent the situation

The compound inequality expression expressing the required score to obtain a B grade is 80 ≤ (169 + t) ≤ 89

Test scores :

Range of B - grade:

Let the her score in the last test = t

Final average score will be :

To obtain a B grade :

The compound inequality expression can be expressed thus :

Therefore, the compound inequality expression is 80 ≤ (169 + t) ≤ 89

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