Use a quantifier to make the following true or false, as indicated, where x is a natural number.4x = 7x (make false)
A. There is no natural number x such that 4x = 7x.
B. For every natural number x, 4x = 7x.
C. No natural number x satisfies 4x = 7x.
Answer: B
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Solve the problem.If x is the hydrogen ion concentration of a sample of water, then the pH of that water sample is 
If the pH of the water from one lake is 7.5 and the pH of the water from a second lake is 8.4, how many times greater is the hydrogen ion concentration of the second lake than the hydrogen ion concentration of the first lake? Round your answer to the nearest hundredth.
A. 7.81 B. 0.13 C. 13.18 D. 7.94
Solve by using the multiplication property of equality.
m = 
A. 
B. 
C. 
D. 
Find the circumference of the circle.
Approximate the circumference. Use ? ? 3.14.
A. 7.620 ft B. 37.68 ft C. 113.040 ft D. 18.840 ft
Solve the system of equations.y = x2 - 6x + 9x + y = 3
A. (-2, 5), (-3, 6) B. (2, 5), (3, 0) C. (3, 0) D. (2, 1), (3, 0)