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. 3
B. 11
C. -11
D. -3
Answer: A
Mathematics
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Determine the slope and the y-intercept. Use the slope and the y-intercept to graph the equation.y = 
x
A. slope: - 
; y-intercept: (0, 0)
B. slope: 
; y-intercept: (0, 0)
C. slope: 
; y-intercept: (0, 0)
D. slope: - 
; y-intercept: (0, 0)
Mathematics
Provide an appropriate answer.Find 
when r = -1 and s = -3 if w(x, y, z) = xz + y2, x = 5r + 6, y = r + s, and z = r - s.
A. 
= -1
B. 
= 10
C. 
= 7
D. 
= 3
Mathematics
Simplify using rational exponents.
? 
A. 12x2
B. 12
y
C. 12x2y
D. 12x2
Mathematics
For the given rectangular equation, write an equivalent polar equation.x2 - y2 = 4
A. cos2? - sin2? = 4r B. cos2? - sin2? = 4 C. r2cos 2? = 4 D. r cos 2? = 4
Mathematics