Simplify. Assume that all variables represent positive real numbers.
- 
A. - 
B. - 
C. -2.5
D. -5
Answer: D
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Provide an appropriate response.Which of the following is not a suggested test-taking tip?
A. Take a practice test. B. Cram for the test. C. Manage your time wisely while taking the test. D. Read the directions on the test carefully.
Solve the problem by writing and solving a suitable system of equations.A chemistry department wants to make 3 liters of a 17.5% basic solution by mixing a 20% solution with a 15% solution. How many liters of each type of basic solution should be used to produce the 17.5% solution?
A. 0.5 liter of 15% and 2.5 liters of 20% B. 1 liter of 15% and 2 liters of 20% C. 2 liters of 15% and 1 liter of 20% D. 1.5 liters of each
Write the system of equations associated with the augmented matrix. Do not solve.
A. 3x + 4y = 13 8x + 15y = 14 B. 4x + 3y = -13 8x + 15y = -14 C. 4x + 3y = 13 15x + 8y = 14 D. 4x + 3y = 13 8x + 15y = 14
Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 
B. 
C. 
D. 