Answer:
x = 12.5
Step-by-step explanation:
By Pythagoras'
16² = 10² + x²
x² = 16² - 10²
x = √(16² - 10²)
x = 12.489...
x = 12.5 (nearest tenth)
1500 J is the correct answer.
Harry has 24; Hermione has 16
x = +4 +1
x = +5
and
x = -4 + 1
x = -3
(-4,-∞)
I think this is what you mean