Divide.6.4 ÷ (-0.8)

A. -8
B. 8
C. 0.8
D. -0.8


Answer: A

Mathematics

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A. x2 + 
B. x2 +  x + 
C. x2 + 
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The dimensions of two matrices are given. Find the dimensions of the product AB and the product BA. If either is not defined, say so.A is 2 × 1; B is 1 × 1.

A. AB is 2 × 2; BA is 1 × 1. B. AB is 2 × 1; BA is not defined. C. AB is 1 × 2; BA is 1 × 1. D. AB is not defined; BA is 1 × 2.

Mathematics