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andrew-mc [135]
3 years ago
7

Which model represent the factors of 4x^2-9

Mathematics
1 answer:
fenix001 [56]3 years ago
6 0

Answer:

(2x - 3)(2x + 3)

Step-by-step explanation:

Given

4x² - 9

This is a difference of squares and factors in general as

a² - b² = (a - b)(a + b)

4x² = (2x)² ⇒ a = 2x

9 = 3² ⇒ b = 3, thus

4x² - 9 = (2x - 3)(2x + 3) ← in factored form

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Alrighty! KFC! Keep, change, flip! When dividing fractions, you keep the first fraction, flip the second, and change the divide sign to multiply. Here is work as requested.
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A woman has twice as many dimes as quarters in her purse. If the dimes were quarters and the quarters were dimes, she would have
Digiron [165]
If x = # of quarters, then, the # of dimes will be equal to 2x. The total value (z) would be equal to:

z = 0.25x + 0.10(2x)

Then, since you switch the quarters and the dimes, and you have a new total, the resulting equation will be:

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4 0
3 years ago
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Verizon [17]

Answer:

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The way to find this out is to take 0.614 and multiply it by 1,000 because then it will be a natural number. 0.614*1,000=614.

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Answer:

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Step-by-step explanation:

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