( a - b - c )^2 - ( b - c )^2 + 2ab - 2ac

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

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.