Question

Esther had 20 minutes to do a three-problem quiz. She spent 9 3 4 minutes on question A and 4 1 2 minutes on question B. How much time did she have left for question C?

Answer 1

Answer:

the time left for question C is $\frac{23}{4}$ minutes

Step-by-step explanation:

The computation of the amount left for question C is shown below:

Time left for question C = Total time - time spend on question A - time spend on question B

$= 20 - 9 \frac{3}{4} - 4\frac{1}{2} \\\\= 20 - \frac{39}{4} - \frac{9}{2}\\\\= \frac{80 - 39 - 18}{4}\\\\= \frac{23}{4}$

hence, the time left for question C is $\frac{23}{4}$ minutes