What is the greatest common factor of 45 and 60?

Agraphic designer created a logo on eight and a half by 11 inch paper. in order to be placed on a business card, the logo needs to be one and 7/10 inches by 2 and 1/5 in. what is the scale factor of the dilation

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the

Which one is the correct answer, and why?