Q7 q7.) find the unit vector in the same direction as v.

Use Pythagorean theorem:

9i-j = sqrt (9^2 - 1^2) = sqrt(81-1) = sqrt80

now divide both terms in V by that:

u = 9/sqrt(80)i - 1/sqrt(80)j

see attached picture: 

21.00 per mile and plus 5.50 is 26.50 i think that im pretty sure it is right

How many people are we starting with? i will answer it's just i need to divide 8 by the total amount of people to get how many tables