Subtract. Write a mixed numeral for the answer. 12
A. 14
B. 15
C. 8
D. 8
Answer: C
Mathematics
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A solution has a hydroxyl ion concentration of 1.43 × 10-12 mol/L. Find the hydrogen ion concentration in this solution.
A. 7 × 103 mol/L [H+] B. 0.07 mol/L [H+] C. 0.7 mol/L [H+] D. 7 × 10-3 mol/L [H+]
Mathematics
Determine algebraically whether the graph is symmetric with respect to the x-axis, the y-axis, and the origin.xy = -5
A. Origin only B. y-axis only C. x-axis, y-axis, origin D. x-axis only
Mathematics
Find the area bounded by the given curves.x = 2, x = 5, y = 
, y = 
A. 1.62 B. 0.92 C. 1.92 D. 0.62
Mathematics
Simplify.(23)-3
A. 29
B. 
C. -3 ? 23
D. 20
Mathematics