Chapter 5 Extra Credit

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| By Dinkinsk

Dinkinsk

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Quizzes Created: 3 | Total Attempts: 2,001

Questions: 7 | Attempts: 63 | Updated: Jun 9, 2023

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Test on 5-1 thru 5-4

Questions and Answers

1.

Simplify (3x^0)^2(2x^4)
- A.
  
  X^4
- B.
  
  12x^4
- C.
  
  18x^6
- D.
  
  18x^4
Correct Answer
D. 18x^4

Explanation
To simplify the given expression, we start by simplifying the exponent of the first term, which is 3x^0. Any number raised to the power of zero is equal to 1, so 3x^0 simplifies to 3.

Next, we square the simplified first term, which gives us 3^2 = 9.

Finally, we multiply the squared first term (9) with the second term (2x^4), which gives us 18x^4.

Therefore, the correct answer is 18x^4.

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2.

Scientists have determined that the speed at which light travels is approxiamtely 300,000,000 meters per second. Express this speed in scientific notation.
- A.
  
  3 x 10^7 m/s
- B.
  
  3 x 10^8 m/s
- C.
  
  3 x 10^(-8) m/s
- D.
  
  30 x 10^(-7) m/s
Correct Answer
B. 3 x 10^8 m/s

Explanation
The speed of light is approximately 300,000,000 meters per second. In scientific notation, this can be expressed as 3 x 10^8 m/s.

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3.

Simplify (5m - 9) + (4m + 2)
- A.
  
  9m - 11
- B.
  
  M - 11
- C.
  
  9m - 7
- D.
  
  20m^2 - 18
Correct Answer
C. 9m - 7

Explanation
The given expression is (5m - 9) + (4m + 2). To simplify this expression, we can combine like terms. The like terms in this expression are the terms with the variable m. Adding the coefficients of these terms, we get 5m + 4m = 9m. Then, we add the constant terms -9 and 2, which gives us -7. Therefore, the simplified expression is 9m - 7.

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4.

Simplify (x^2 - 2x - 35) / (x + 5)
- A.
  
  X^2 - x - 30
- B.
  
  X - 7
- C.
  
  X + 5
- D.
  
  X^3 + 3x^2
Correct Answer
B. X - 7

Explanation
To simplify the expression (x^2 - 2x - 35) / (x + 5), we can factor the numerator as (x - 7)(x + 5). Then, we can cancel out the common factor of (x + 5) in the numerator and denominator, leaving us with the simplified expression x - 7.

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5.

Factor m^2 + 9m + 14 completely.
- A.
  
  M(m + 23)
- B.
  
  (m + 14)(m + 1)
- C.
  
  (m + 7)(M + 2)
- D.
  
  M(m + 9) + 14
Correct Answer
C. (m + 7)(M + 2)

Explanation
The given expression is a quadratic trinomial in the form of m^2 + 9m + 14. To factor it completely, we need to find two binomials whose product equals the given trinomial. By using the factoring method, we can determine that the correct factorization is (m + 7)(m + 2).

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6.
- A.
  
  A
- B.
  
  B
- C.
  
  C
- D.
  
  D
Correct Answer
D. D
7.

Simplify (t^2 + t -6) / (t^2 -7t + 10). Assume that the denominator is not equal to sero.
- A.
  
  (t + 3) / (t - 5)
- B.
  
  (t - 2) / (t + 5)
- C.
  
  (t - 3) / (t + 5)
- D.
  
  (t + 3) / (t + 5)
Correct Answer
A. (t + 3) / (t - 5)

Explanation
The given expression can be simplified by factoring the numerator and the denominator. The numerator can be factored as (t + 3)(t - 2), and the denominator can be factored as (t - 5)(t - 2). By canceling out the common factor of (t - 2), we are left with (t + 3)/(t - 5).

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Jun 09, 2023

Quiz Edited by
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Nov 21, 2008

Quiz Created by
Dinkinsk

Chapter 5 Extra Credit

Simplify (3x^0)^2(2x^4)

Scientists have determined that the speed at which light travels is approxiamtely 300,000,000 meters per second. Express this speed in scientific notation.

Simplify (5m - 9) + (4m + 2)

Simplify (x^2 - 2x - 35) / (x + 5)

Factor m^2 + 9m + 14 completely.

Simplify (t^2 + t -6) / (t^2 -7t + 10). Assume that the denominator is not equal to sero.