Answer:
X=7
Step-by-step explanation:
Answer:
Step-by-step explanation:
Two cheaper books = x
more expensive = 1.5x
so, 2.5x=150
150/2.5=x=60
therefore the more expensive book = 90
Let's say that you have a random vector g, <span>then the covariance matrix of </span><span>gg</span> is defined as K=E{(g−g¯)(g−g¯)†} where the letter E denotes expectation, <span>g¯</span><span> denotes the mean of </span><span>gg</span>, † means transpose for real random vector, and conjugate transpose for complex random vector. The correlation matrix is R=E{gg†} So we have K=R−g¯g¯† For zero-mean random vectors K=R
