AGES Zack is 15 years old. This is 3 years younger than his brother Tyler.
How old is Tyler?

What is the common difference in the following arithmetic sequence 7,3,-1,-5

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent