Which sentence uses the underlined vocabulary word incorrectly? A. The duly principal was always late. B. He informed me that I would have to retake the course directly. C. Some infirmities can be overcome by a change in lifestyle.

Show his work so he doesn’t get points taken off. this is because even if he can do calculations in his head, he may make a mistake and having it on the paper will not only him find mistakes but show that he was doing the work as well.