Provide an appropriate response.Find the complement of an angle whose measure is 33°21'.
A. 57°38'
B. 56°21'
C. 56°39'
D. 57°39'
Answer: C
Mathematics
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Solve.Find the hydrogen ion concentration of a solution whose pH is 6.6. Use the formula 
A. 3.98 × 106 B. 2.51 × 10-7 C. 0.81954394 D. -0.8195439
Mathematics
Write the complex number in the form a + bi.
A. 
+ 
i
B. 
+ 
i
C. 
+ 
i
D. 
+ 
i
Mathematics
Solve by the substitution method.x - 5y = -28-4x - 6y = -44
A. {(1, 7)} B. {(2, 6)} C. {(-2, 7)} D. ?
Mathematics
Solve the problem.To get credit for graduation, Brittany completed 20 hours of community service. She worked at a soup kitchen for 
of the time. She picked up litter along highways for 
of the time. The rest of the hours she spent tutoring younger children after school. How much time did Brittany spend tutoring?
A. 8 hours
B. 7
hours
C. 9
hours
D. 8
hours
Mathematics