ń 4. Var(w) 5. E(x²) 6. E(y²)

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter6: Linear Systems
Section6.2: Guassian Elimination And Matrix Methods
Problem 84E: Explain the differences between Gaussian elimination and Gauss-Jordan elimination.
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Hello there plz solve this math question from branch 4 to 7 

Example 21: If E(x) = 3, E(y) = 5), V(X) = 8, V(Y) = 12, Cov(x, y) = 1, And
if u = 2x-y, w = 3x - 2y Find
1. E(u)
2. E(W)
3. Var(u)
4. Var(w)
5. E(x²)
6. E(y²)
7. E(xy).
Solution:
Transcribed Image Text:Example 21: If E(x) = 3, E(y) = 5), V(X) = 8, V(Y) = 12, Cov(x, y) = 1, And if u = 2x-y, w = 3x - 2y Find 1. E(u) 2. E(W) 3. Var(u) 4. Var(w) 5. E(x²) 6. E(y²) 7. E(xy). Solution:
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