Express the average age of three sisters in the terms of the age a of the firstborn (in years) if the second was born 4 years after the first and the third was born 6 years after the second.

Tell me how you got the it use the figures to answer questions 1and 2. in each diagram, line k is parallel to line l, and line t intersects lines. 1. based on the diagrams, what is the value of x? 2. how would you verify your answer for x?

The base of a triangle exceeds the height by 7 centimeters. if the area is 400 square centimeters, find the length of the base and the height of the triangle.

Acircle has a circumference of 28.36 units what is the diameter of the circle