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3 years ago

13

Choose the correct simplification of the expression (−2x + 4y)(3x − 7y).

1 answer:

Rudik [331]3 years ago

3 0

-2x • 3x = -6x2 (the 2 is an exponent)
4y • -7y = -28y2 (the 2 is an exponent)
-2x • -7y = 14xy
4y • 3x = 12xy
14xy + 12xy = 26xy

—> -6x2(expo) - 28y2(expo) + 26xy

Check the answer again just to be sure, it’s been a while since I’ve had algebra!

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finlep [7]

Answer:

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Step-by-step explanation:

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kirill115 [55]

<span> 9-4x=57
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Anton [14]

Method 1:

Look at the picture.

$\dfrac{1}{7}$ is greater than $\dfrac{1}{9}$

$\boxed{\dfrac{1}{7}>\dfrac{1}{9}}$

Method 2:

Find the common denominator:

multiples of 7: 0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, ...

multiples of 9: 0, 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, ...

63 = 7 · 9

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therefore

$\dfrac{1}{7} > \dfrac{1}{9}$

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3 years ago

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Aleks [24]

Answer:

the answer is C. how you got 24

Step-by-step explanation:

so find the square of 2 first and that would give -8

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tangare [24]

Answer:

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Step-by-step explanation:

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