Solve the equation for the indicated variable. Assume that the dimensions are such that matrix multiplication and addition are possible and that inverses exist when needed.Solve for A: AY - A = B
A. A = Y-1 B - I
B. A = B(Y - I)-1
C. A = (Y - I)-1 B
D. A = BY-1 + I
Answer: B
Mathematics
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Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. What are Mr. Cameron's expected concert earning?
A. $300,000 B. $360,000 C. $60,000 D. $218,400
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Simplify.
A. 8x(x + 8) B. x + 8 C. -(x + 8) D. -(x - 8)
Mathematics
Evaluate the function 
at x = 3. 6 Round to 3 decimal places.
A) 5.287 B) 4.680 C) 20.055 D) 2.572 E) 1.690
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Find the greatest common factor of the set of numbers. 42, 56, and 98
A. 1 B. 42 C. 14 D. 7
Mathematics