Hi, please help me, explain please If the number 2 is one of the roots of the equation 2x ^ 2 + 3x + k = 0 ,then find the value of k.​

What percent of the circle below is shaded?

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.

How do you determine if an ordered pair is a solution to a given equation?