Solve the following problems using a strategy. 3 5 5 4 +2 8 +4 3

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table

What is the geometric mean of 3 and 7? a) square root of 21 b) 2 square root of 6 c) 2 square root of 7 d) 21