Alex is training for a school jog-a-thon and needs to run at least one mile per day if Alex runs to his grandma's house which is 5 / 8 of a mile away, and the to his friends Justin's house, which is of a mile away, will he have trained enough for the day?​

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

I'm confused on this could anyone me and show me what i need to do to solve it.

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 california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.