Due in 2 mins
mr. harrison has $416 to spend on supplies for his classroom. he will buy a bookshelf and some books. the bookshelf cost $80. he will buy books that cost $4 each. write then slove an inequality to find the number of b (b) at most he can buy

You already know the total will be 416, and that the bookshelf costs $80, so you already have a part of the equation. The rest of the equation can be 4b, where b is equal to books. So, you'd write it like this:
4b+80=416

To solve this, you have to move 80 to the other side. To do this, subtract 80 from both sides so that you get this:
4b=336

Then, divide both sides by 4 to get the maximum amount of books Mr. Harrison can buy:
b=84

Mr. Harrison can buy a maximum of 84 books, along with the $80 bookshelf.

First subtract 10 from both side
y^2+6y-16=0
(y+8)(y-2)=0
-8 and 2