The ratio of balls in a bag is as follows: 5 green: 1 yellow: 6 black
how many balls would there be in the bag if you have 72 black balls?

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.