Answer:
45 minutes.
Explanation:
Yesterday, he made 6 keychains in 30 minutes.
Hugo wants to make 9 keychains today. We need to find how long will it take him to make the keychains.
6 keychains = 30 minutes
1 keychains = (30/6) minutes
For 9 keychains,
![9\ \text{keychains}=(30)/(6)* 9\\\\=45\ \text{minutes}](https://img.qammunity.org/2021/formulas/mathematics/high-school/z0ctvtakawj593r64xiuxrvnugujdt8j5s.png)
So, to make 9 keychains, it will take 45 minutes.