Please help fast I’d appreciate it! The slope of a line is 2. The line passes through (-1,K) and (4, 8) find the value of K. Please EXPLAIN Thx!!!

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1