What is the greatest common factor of 60x*y, 45xys, and 758°y?
5xy
15xºy
45xys
75xy

The length and a quarter of the width of a rectangle add up to 7 in, while the length and the width add up to 10 in. what are the rectangle's length and width?

How do i do this? i don’t understand

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.