Pls hurry! This is due today!!

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

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?

Astock has a 25% probability of increasing by $10 and a 75% probability of decreasing by $5. what is the stocks expected increase or decrease?