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3 years ago

A student wrote the expression -3(8 - 10) as - 24 + 30. Which property did the student use?

1 answer:

4 0

<h2>They used the distributive property.</h2><h3></h3><h3>-3(8 - 10)</h3><h3></h3><h3>-3 x 8 = -24</h3><h3>-3 x -10 = 30</h3><h3></h3><h3>-24 + 30</h3><h3></h3><h3><em>Please let me know if I am wrong.</em></h3><h3></h3><h3 />

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devlian [24]

I'll explain how I found it without actual multiplication,

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3 years ago

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finlep [7]

1.5y < -6.75

First, divide both sides by '1.5'.
$\frac{-6.5}{1.5}$
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3 years ago

Factor completely 81x8 − 1. (9x4 − 1)(9x4 1) (3x2 − 1)(3x2 1)(9x4 − 1) (3x2 − 1)(3x2 1)(9x4 1) (3x2 − 1)(3x2 1)(3x2 1)(3x2 1).

mojhsa [17]

Answer:

(3x^2 - 1)(3x^2 + 1)(9x^4 + 1).

Step-by-step explanation:

Using the identity for the difference of 2 squares;

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we put a^2 = 81x^8 and b^2 = 1 giving

a = 9x^4 and b = 1, so:

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Applying the difference of 2 squares to 9x^4 - 1:

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3 years ago

A student wrote the expression -3(8 - 10) as - 24 + 30. Which property did the student use?​

A student wrote the expression -3(8 - 10) as - 24 + 30. Which property did the student use?