The number of miles covered every evening obtujwd using a <em>system of equation</em> is 15 miles.
<u>Let the number of miles per evening</u> = m
- Number of miles per morning = 8 miles
- Total miles covered = 115 miles
<u>Using the expression below :</u>
<em>Number of days(miles per morning + miles per evening) = 115 miles </em>
5(8 + m) = 115
40 + 5m = 115
5m = 115 - 40
5m = 75
m = 75 / 5
m = 15 miles
Therefore, the Number of miles covered per evening is 15 miles.
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Porobability distribution of X
x P(x)
0 0.2
1 0.4
2 0.4
Total .1.0
i] Expectation
Mean=Σxp
Variance=x²p-(∑xp)²
thus:
Mean=(0*0.2)+(1*0.4)+(2*0.4)
=0+0.4+0.8
=1.2
ii] Variance
Variance=[(0²*0.2)+(1²*0.4)+(2²*0.4)]-(1.2)²
=[0+0.4+1.6]-1.44
=0.56
hence:
standard deviation=sqrt(0.56)=0.74833
Answer:
unit rate is similar to speed / velocity:
[<em>unit</em><em> </em><em>rate</em><em> </em><em>must</em><em> </em><em>have</em><em> </em><em>units</em><em> </em><em>including</em><em> </em><em>per</em><em> </em><em><</em><em>time</em><em>></em><em> </em>]
5.319 to 5.3
To the right of the decimal the places are tenths, hundredths, thousandths etc.
Since 3 is in the tenths place it is rounded to the nearest tenth.
I hope this helps!