Answer:
15
Step-by-step explanation:
marks for correct answers = 5×5= 25
marks lost for incorrect answers = 5 ×2= 10 or -10 gained
so total marks = 25 +(-10) = 15
use calculator
The length of AB = 17
AB = √[(10-2)^2 + (4-19)^2]
AB = √(64 + 225)
AB = √289
AB = 17
