Answer:
3
Step-by-step explanation:
12
1:2:4
let josh=1x
james=2x
john=4x
josh has nine sweets less than john
4x-1x=9
3x=9
x=3
john's sweet=4x
4(3)=12
10² + 15² = 325
√325 = 18
X=8.6
;)
