A and b are two vectors and |a| = 3. Find the value of |a+b| when: (i) b = 2a
(ii) b = -3a
(iii) b is perpendicular to a and |b| = 4

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

What is 1/2 x (6 x 4)+3 + 2 show your work

Luke wants to reduce the area of his rectangular garden by 1/4 the expression 14/w can be used to represent this change. what is another way to write this expression?