Answer:
1/2= 5/10
5/10 - 3/10 = 2/10 or 1/5
so planet X is 1/5 of a light-year closer
Step-by-step explanation:
Opening brackets gives;
4-8v=-8v+4
Putting like terms together;
4-4=-8v+8v
0=0
There is no solution thus.
Answer:


Step-by-step explanation:
Given


Solving (a): The mean
This is calculated as:

So, we have:



Solving (b): The standard deviation
This is calculated as:

So, we have:




Answer:
The answer is D.) 27
Step-by-step explanation:
This problem forms a right triangle and with the 90ft wire being the hypotenuse, you subtract 63 from 90 and you get 27.
Hope I helped! :)