I need help with this please

Step-by-step explanation:

A(0,0)

C(a,a)

The mid point of AC =(0+a/2, 0+a/2)

=(a/2 , a/2)

The value that belongs to the green box = 2

2

Step-by-step explanation:

(x1 +x2) /2 , (y1 + y2)/2

a's coordinates are : ( 0,0) -- where 0 (left) is the x axis , 0 (right) is the y axis

c's coordinates are : ( a,a)-- where a (left) is the x axis , a (right) is the y axis

( a - 0)/2 , (a - 0)/2

=a/2 , a/2

hence the value in the green box is 2

he spend 5.1 minutes chatting with his friends

step-by-step explanation:

2/5+1/2=9/10

6/1-9/10=5 1/10

50-38=12

step-by-step explanation: