Solve the system, using Cramer's rule, if possible. x - 2y + 3z = 114x + y - z = 42x - y + 3z = 10
A. {(2, -3, 1)}
B. {(-2, -3, 3)}
C. ?
D. {(2, 3, 5)}
Answer: A
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Provide an appropriate response.
is the formula to find time.
A. 
B. 
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D. 
Solve the problem.In a recent survey in Canada, 88.8% of men shave with a razor blade, which is 1.5 times the percentage of men in Canada who shave with an electric razor. What is the percentage of men in Canada who shave with an electric razor?
A. 29.6% B. 44.4% C. 59.2% D. 88.8%
Solve the problem.A firm is considering a new product. The accounting department estimates that the total cost, C(x), of producing x units will be C(x) = 50x + 4540.The sales department estimates that the revenue, R(x), from selling x units will be R(x) = 60x,but that no more than 648 units can be sold at that price. Find and interpret (R - C)(648).
A. $1102 profit, income exceeds cost It is worth it to develop product. B. $75,820 profit, income exceeds cost It is worth it to develop product. C. $1940 profit, income exceeds cost It is worth it to develop product. D. -$1940 loss, cost exceeds income It is not worth it to develop product.
Solve the problem.The population of a certain country is growing at a rate of 1.2% per year. How long will it take for this country's population to double? Use the formula 
which gives the time, t, for a population with growth rate k, to double. (Round to the nearest whole year.)
A. 60 years B. 59 years C. 57 years D. 58 years