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 
.
1. Use comminutive property to reorder the x and the y
u=yx/5
2. Multiply both side by 5/y
5u/y=x
3. Then y write it in parametric form
X=5u/y
Factor -1 out of -3.6z -10.8
your answer should be -(3.6z+10.8)
Answer:
B
Step-by-step explanation
add all numbers then divide by the number of numbers and you get the means
1 km= 100,000 cm
5.5km x 100,000 = 550,000 cm
Hope this helps
