Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. 
B. {(6, 3)}
C. 
D. no solution; ?
Answer: D
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The graph shows a region of feasible solutions. Find the maximum or minimum values of the given expression.Find the maximum and minimum of 12x + 2y.
A. 130, 120 B. 120, 6 C. 130, 6 D. 10, 6
Answer the question.A cell has at least 3 and at most 47 nuclei. How many cells must a scientist view under his microscope to be certain that at least two cells have the same number of nuclei?
A. 45 cells B. 47 cells C. 44 cells D. 46 cells
Solve.How long will it take for $2200 to grow to $20,000 at an interest rate of 6.6% if the interest is compounded quarterly? Round the number of years to the nearest hundredth.
A. 34.54 yr B. 138.87 yr C. 33.72 yr D. 134.87 yr