If DF = 170, find the value of x. Then find DE and EF.
DE=3x + 20
EF=2x + 40

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan for ?

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Candy lives in the center of town. her friend darlene lives 28 miles to the east and her friend dana lives 21 miles north. approximately how far do dana and darline live apart ?