Determine the value of a so that a = 2i+aj+k and b = 4i-2j-2k are perpendicular

5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)

Y=21.95x+10 y=22.45x solve by substitution

Alice is paying her bill at a restaurant. but tax on the cost of a male is 5%. she decides to leave a tip 20% of the cost of the meal plus the tax