CliffsNotes Civil Service Exam Cram Plan by Northeast Editing Inc

Author:Northeast Editing, Inc.
Language: eng
Format: epub
ISBN: 9781118077313
Publisher: HMH Books
Published: 2011-08-15T00:00:00+00:00

2. D To evaluate the expression 6n(n + m), you must first substitute the variables with their given values. This leaves you with 6(3)(3 + 4). To solve this expression, you must follow the order of operations. First, add the integers within the parenthesis to get 6(3)(7). Now, just multiply: 6 · 3 · 7= 126.

3. C To solve the inequality 15y – 7 > 10y + 18:

4. C In this problem, you’re given the distance (220 miles) and the rate (55 miles an hour), so you must solve for time:

5. A To simplify this expression, use the FOIL method. Multiply the first number or variable in each binomial, then the numbers or variables on the outside, then the inside, and then the last two numbers in each binomial. First, multiply x by x to get x2. Then, multiply x by 3 to get 3x. Then, 2 multiplied by x is 2x. Finally, multiply 2 by 3 to get 6. Now, add them together to simplify the original expression: x2 + 3x + 2x + 6 = x2 + 5x + 6.

6. C To solve the equation 6n + 7 = 4n + 21:

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