10) 11
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Distance can’t be negative so add the distance and it’s 19m time is 11min distance/time is velocity her velocity was 1.72m/min
Answer:
980
Step-by-step explanation:
I did it
Answer:
Each diagonal element will be 3. Off-diagonal elements will be zero.
Step-by-step explanation:
The one that looks like ...
- Reflection about the y-axis has rule (x,y)→(-x,y);
- Reflection about the x-axis has rule: (x,y)→(x,-y).
Consider rectangle ABCD and select, for example point A(-5,1).The set of reflections about the y-axis, x-axis, y-axis, x-axis will act on A in following way:
- about y-axis A(-5,1)→A'(5,1);
- about x-axis A'(5,1)→A''(5,-1);
- about y-axis A''(5,-1)→A'''(-5,-1);
- about x-axis A'''(-5,-1)→A(-5,1).
This reflections act on all rectangle vertices in the same way, then
the set of reflections that carry rectangle ABCD onto itself is
y-axis, x-axis, y-axis, x-axis