John made a rectangle pen for his dog using 28 feet of fencing. if the width of the pen is 2 feet more than one-half the length, what is the length and width of the pen?
the length of the pen is

6 feet
7 feet
8 feet

1. what are the missing reasons in the proof 2. it's in the second picture and 3

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Which best explains why this triangle is or is not a right triangle ?