Solve by addition or substitution. x - 2y = -72x - 3y = -13
A. (-6, 2)
B. (-5, 1)
C. (5, 2)
D. ?
Answer: B
Mathematics
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What value of x gives the minimum value of the quadratic function 
? Round your answer to two decimal places.
?
A. 2.66 B. 2.44 C. 1.27 D. 0.38
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Find the flux of the curl of field F through the shell S.F = x4i + 4xj + 8k; S is the upper hemisphere of x2 + y2 + z2 = 64
A. 64 B. 64? C. ? D. 256?
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Solve the problem.A drippy faucet wastes 24 oz of water a day. If there are 89 million such drippy faucets, how much water, in gallons, is wasted in a day?
A. 16,687,500 gal/day B. 66,750,000 gal/day C. 2136 gal/day D. 33,375,000 gal/day
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Use your estimation skills to pick the most reasonable answer. Do not solve the problem.9.9 - 0.04
A. 98.6 B. 0.986 C. 9.86
Mathematics