The mean of 6 numbers is 15. The numbers are in the ratio 1 : 3 : 4 : 7 : 7 : 8.
Find the range.

Landon is entering the science fair. he has a budget of $115. he has spent 20 percent of the money on new materials. how much does landon have left to spend?

Two parallel lines are crossed by a transversal. what is the value of x? x = 40 x = 70 x = 110 x = 130

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks