Simplify 8g+9h-4g-5h include instructions plz

Y= a(x-3)squared-1 what is the value of a

Hart manufacturing had six-month sales of $80 million, with $20 million of that amount from the internet. it set a goal to increase the percentage of total sales coming from the internet by 4 percent in the next six months. the results were total sales of $85 million. if the company meets its goal exactly, what will the dollar amount of internet sales be?

What is the answer for the problems 6x+y=36 and 5x−y=8?