Look at the images plase i will mark the brianlest

Which graph corresponds to the function f(x) = x2 + 4x – 1?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Larry wants to buy some carpeting for his living room. the length of the room is 4 times the width and the total area of the room is 16 square meters. what is the length of the living room