Find the exact function value.cot 45°
A. 
B. 
C. 1
D. 
Answer: C
Mathematics
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When possible, apply the distributive law and combine like terms.11x - x - 2x + x
A. 11x B. x2 + 9x C. 9x D. -x2 + 9x
Mathematics
Perform the indicated operation. Give the answer in lowest terms.
A. 
B. 45y
C. 
D. 40y
Mathematics
Solve the problem.The hydrogen ion concentration of a substance is about 4.2 × 10-6 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 6.6 B. -6.6 C. 5.4 D. 5.7
Mathematics
Simplify the complex fraction.
A. 
B. 
C. 
D. 
Mathematics