Subtract the real numbers. Write any improper fraction as a whole or mixed number where appropriate.2
- 
A. 5
B. -6
C. 6
D. -5
Answer: C
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Solve.In chemistry, the pH of a substance is defined by 
where 
is the hydrogen ion concentration in moles per liter. Find the 
of a sample of lake water whose 
is 
moles per liter. (Round to the nearest tenth.)
A. 6.4 B. 7.3 C. 10.1 D. 8.5
Find the indicated term of the binomial expansion.9th term; (x - 2y)11
A. 42,240x8y3 B. -21,120x3y9 C. -21,120x8y3 D. 42,240x3y8
You are planning on purchasing a new car and have your eye on a specific model. You know that new car prices are projected to increase at a rate of 5% per year for the next few years. Use a graphing calculator to approximate how long will it take your dream car to cost $50,000 if it currently costs $28,000.
A. 11.9 years B. 1.7 years C. 0.6 years D. 36.6 years
Solve the equation in the real number system.x3 + 3x2 - 8x + 10 = 0
A. {-5, 5} B. {-5} C. {1} D. {5}