Mary is 15 years older then her niece Katie. In 10 years Mary is two times as old as katie. How old are Mary and Katie now?

Find the value of - 5 - ( - 6) - (-3) =

2,412 feet is how many miles rounded to the nearest hundredth

The elevation in denver colorado is 13 times greater than that of waikapu, hawaii. the sum of their elevations is 5600 feet. find the elevation of each city

The diameter of each wheel of a bicycle is 28 inches28 inches. if you are traveling at a speed of 40 miles per hour40 miles per hour on this bicycle, through how many revolutions per minute are the wheels turning?

kyle drew a map of his neighbohood he used a scale in which 1 cm equal 2 miles what distance on kyle map should represent the 1.5 miles between his house and the nearest grocery store

How do you regroup 42-15

7k:3=21. What is the value of k?

Which of the pairs of angles are vertical angles and thus congruent?

3r + 7r, Solve for r

Which of these are the intercepts of the graph of y = 3x - 12?