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 3 × 1; B is 1 × 3.
A. AB is 1 × 1; BA is 3 × 3.
B. AB is not defined; BA is 1 × 1.
C. AB is 3 × 3; BA is 1 × 1.
D. AB is 3 × 3; BA is not defined.
Answer: C
Mathematics
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Citation Manufacturing produces electronic components that sell for $600 each. The fixed production costs are $720,000 when 30,000 or fewer components are produced, and variable production costs are $510 per component. What is Citation's operating breakeven point?
A. 8,000 components B. 1,200 components C. 1,412 components D. $720,000 in sales E. $389,189 in sales
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Solve the equation.d + 30 = -7
A. -37 B. -23 C. 23 D. 37
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Perform the operations and simplify.
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Assume that no denominators are 0.
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A. ?
B. ?
C. 
D. ?
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Match the quadratic function to the correct graph.y = - 
(x + 4)2 - 2
A. 
B. 
C. 
D. 
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