Answer:
True
Step-by-step explanation:
Every orthogonal matrix is invertible. This is a true statement.
Orthogonal matrices are square matrix whose rows and columns are orthogonal unit vectors.
In an orthogonal matrix columns are linearly independent and since the columns are linearly independent the matrix will be matrix will be invertible. This is according to invertible matrix theorem.
The value of the expression C(6,3) is 20
<h3>How to evaluate the expression?</h3>
The expression is given as:
C(6, 3)
This means 6 combination 3.
And it can be written as:

Apply the combination formula

Evaluate the expression

Hence, the value of the expression C(6,3) is 20
Read more about combination at:
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Hopefully this help you !!
Answer:
g12. 85 + b4. 79
Step-by-step explanation:
g and b is just the amount she buys