Answer:
11
Step-by-step explanation:

Answer:
3:1 or 3
Step-by-step explanation:
the left triangle is scaling up to the right triangle. 5/15 is 1/3
7/21 is 1/3
4/14 is 1/3
since it is scaling UP, the scale factor is 3:1
Answer:
99,999
Step-by-step explanation:
The answer is 6.89 because
6.89+14.52=21.41
So 21.41+(-14.52)=6.89