Exponents and power - evaluate

Which of the following points is collinear with (-2,1) and (0,3)

What is the absolute value of the complex number -4-sqrt2i

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.