# Chapter 6 Quiz: Rational Expressions & Equations

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• 1.

### Factor using slide and divide:

• A.

(2x - 1)(x + 7)

• B.

(2x + 1)(x - 7)

• C.

(x + 14)(x - 1)

• D.

2(x - 7)(x + 1)

A. (2x - 1)(x + 7)
Explanation
The given answer is correct because when we multiply (2x - 1) and (x + 7) using the distributive property, we get 2x^2 + 14x - x - 7, which simplifies to 2x^2 + 13x - 7. This matches the expression given in the question, so (2x - 1)(x + 7) is the correct factorization.

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A

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### Exchange Rates  Robyn spent two months traveling in New Zealand.  The day she arrived the exchange rate was 1.3 New Zealand dollars per every 1 U.S. dollar.  If she exchanged \$500 U.S. dollars when she arrived, how much in New Zealand dollars did she receive?

• A.

\$384.62

• B.

\$650

• C.

\$325

• D.

\$822.15

B. \$650
Explanation
Robyn exchanged \$500 U.S. dollars when she arrived in New Zealand. The exchange rate was 1.3 New Zealand dollars per every 1 U.S. dollar. To find out how much in New Zealand dollars she received, we need to multiply the amount of U.S. dollars by the exchange rate. Therefore, \$500 multiplied by 1.3 equals \$650. So, Robyn received \$650 in New Zealand dollars.

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