Is this correct?

12. 8u+2 = 6

-2 -2

8u = 4

÷4 ÷4

u = 1

check: 8(1) = 8

Hiroki and Karen

Step-by-step explanation:

Given the following :

3K Times Runner - - - - - - Time compared to personal best

Gregor +5.6

Hiroki –11.6

Isabelle +3.2

Juan 0

Karen –5.2

Evaluating the times compared to personal best given :

Gregor ran better than his personal best(+5.6)

Hiroki ran slower than his personal best at (–11.6)

Isabelle ran faster than his personal best (+3.2)

Juan had no improvement or decline (0)

Karen slower than his personal best ( –5.2)