Solve.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. 5.21
B. 5.79
C. 6.21
D. 6.79
Answer: A
Mathematics
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Subtract.2 + (-12) - (-20) + 16
A. 26 B. 10 C. -14 D. -6
Mathematics
Draw the graph of the equation.y = 
A. 
B. 
C. 
D. 
Mathematics
Use the formula for the general term (the nth term) of an arithmetic sequence to find the indicated term of the sequence with the given first term, a1, and common difference, d.Find a21 when a1 = 5, d = 1.
A. - 15 B. 25 C. - 16 D. 26
Mathematics
Use the given graph to find the x-intercepts.
A. 4, 1 B. -4, 1 C. -1, 4 D. -4, -1
Mathematics