The augmented matrix is in row-echelon form and represents a system of linear equations. Solve the system using back-substitution.
A. {(53, -28, 9)}
B. ?
C. {(70, -29, 9)}
D. {(68, -28, 9)}
Answer: D
Mathematics
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?
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Find the trigonometric function value for the angle shown.tan ?
A. tan ? = 
B. tan ? = 
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Solve the problem.The table shows the amount of yeast cells (measured as biomass) growing over a 7-hour period in a nutrient. (a) Find a regression quadratic for the data. (b) Use the regression quadratic to predict the biomass of yeast in the nutrient after 10 hours.
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Mathematics