Answer:
8
Dont mind me if i am wrong!
Step-by-step explanation:

Answer: 80
Write down all the values and cross out until you get to the middle, since there are 2 values, find the mean, which would be 80
Answer: 15
Step-by-step explanation:
If two points are together, then you subtract the numbers to get the distance
19 - 4 = 15
Rectangle Formula: a = lw (Area = Length x Width)
Trapezium: A= a+b/2h (Area = Area + Base / 2 x h)
I hope this helps. :)