Answer:
none of the above.
Are u sure question is correct?
Answer:
x = 8, y = 1
Step-by-step explanation:
Given that the triangles are similar then the ratios of corresponding sides are equal, that is
= ( cross- multiply )
4y = 4 ( divide both sides by 4 )
y = 1
Also
= ( cross- multiply )
x = 8
Answer:
2.42
Step-by-step explanation:
standard deviation= sqrt(variance)
Variance=E[X2] - E[X]2
E[X] = sum(X)/n=35/9, so E[X]2 = 1225/81
E[X2] =sum(X2)/n = 189/9 = 170/81
Variance= 476/81
Standard deviation = sqrt(476/81) ~2.42