What is the square root of 22

What is the vertex form of f(x) = x2 + 6x + 3

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.

In a sale there is 25% of all prices a chair costs £45 in sale how much was it before the sale