The slope of BC is 
Step-by-step explanation:
Let us revise some notes about slopes of lines
- If two lines are parallel, then their slopes are equal
- If to lines are perpendicular, then the product of their slopes is -1, that means if the slope of one is m, then the slope of the other is

∵ ABCD is a rectangle
∵ AB // CD
∴ The slope of AB = the slope of CD
∵ BC ⊥ AB
∴ The slope of BC × the slope of AB = -1
∵ The slope of AB = 
- To find the slope of BC reciprocal the slope of AB and reverse its sign
∴ The slope of BC = 
The slope of BC is 
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Answer:1. 7 2. 
Step-by-step explanation:
1.
= 7
2.
( doesn't have any simplest radical form)
Answer:
60%
Because the reaming percent has to add up to 100. 60 plus 40 is 100
Answer:
5 m/s
Step-by-step explanation:
100 meters divided by 20 seconds