A meteorologist was monitoring the temperature outside in degrees Fahrenheit (°F) and wrote the expression 78+(6)-5. Which statement best describes this expression?

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.