Solve the given equation by completing the square.a2 + 10a + 9 = 0
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve the problem.In a certain coastal basin, the sea water contains 3.9 grams of salt per 1000 milliliters of water. How many grams of salt would be in 3 liters of the sea water?
A. 117 grams B. 0.117 grams C. 1170 grams D. 11.7 grams
Mathematics
Solve the equation on the interval 0 ? ? < 2?.sin2 ? + sin ? = 0
A. 
B. 
C. 
D. 
Mathematics
Simplify.6 ? 7 + 8(7 - 2) + 1
A. 97 B. 451 C. 83 D. 90
Mathematics
Find the expected value.A car agency has found daily demand to be as shown in the table.
Find the expected number of customers.
A. 9 B. 12 C. 10 D. 2
Mathematics