Answer:
12
Step-by-step explanation:
55/100=6.6/X
Multiplication of cross products
Step-by-step explanation:
Given that,
The area of a blackboard is 
The area of poster is 
We need to find the unit rate of the blackboard's area to the poster's area. So, it can be calcualted by dividing blackboard's area to the poster's area.
So,

So, the rate of
.
Answer: B
Step-by-step explanation: idc
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Answer:
y=3
Step-by-step explanation:
(3 + 12) / (7 - 12) = (15) / (-5) = -3