The easy answer: If, say, B is the zero matrix, i.e.

then

Answer: 14 dogs
Step-by-step explanation:
Given
The ratio of cats to dogs is 9:7
The shelter has 18 cats
Suppose shelter has x dogs

Answer:
4 is answer
Step-by-step explanation:
y=2 x=6-2 x=4
Answer:
3
Step-by-step explanation: