Identify all equivalent expressions for:

(4g^−3)(2g^4)

Responses

8g
8 g

4×g×g×g×2×g×g×g×g
4×g×g×g×2×g×g×g×g

4×2×g×g×g×gg×g×g
4×2×g×g×g×gg×g×g

8g^7

1 answer

To simplify the expression \( (4g^{-3})(2g^{4}) \), we can use the properties of exponents and multiplication:

  1. Multiply the coefficients: \[ 4 \cdot 2 = 8 \]

  2. Combine the terms with exponents: \[ g^{-3} \cdot g^{4} = g^{-3 + 4} = g^{1} \]

Putting it all together: \[ (4g^{-3})(2g^{4}) = 8g^{1} = 8g \]

Now let's analyze the given options:

  1. 8g

    • Equivalent to \( 8g^{1} \).
  2. 4×g×g×g×2×g×g×g×g

    • This expression expands \( 4g^{-3} \) as \( g^{-3} = \frac{1}{g^3} \) and \( 2g^{4} \) as it is, but it doesn’t simplify to \( 8g \). It would yield \( \frac{8g^{4}}{g^{3}} = 8g^{1} = 8g \), which means this is equivalent after simplification.
  3. 4×2×g×g×g×gg×g×g

    • This seems to be another representation but is not clear as written. Simplifying correctly, \( g^2 \) (not written as \( gg \)) added to \( g^3 \) does make sense, and it leads us to \( 8g \) equivalently.
  4. 4×2×g×g×g×gg×g×g

    • This is the same as the previous option and has a similar simplification.
  5. 8g^7

    • This does not match; \( g^7 \) is not equivalent to \( g^{1} \).

Thus, the equivalent expressions for \( (4g^{-3})(2g^4) = 8g \) are:

  • \( 8g \)
  • \( 4×g×g×g×2×g×g×g×g \)
  • \( 4×2×g×g×g×gg×g×g \)
  • and its variations that align with the above representations.

Final equivalent labels:

  • \( 8g \)
  • \( 4×g×g×g×2×g×g×g×g \) after simplification
  • \( 4×2×g×g×g×gg×g×g \) after correct simplification
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