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elena55 [62]
4 years ago
5

Whats the answer for (5x + 8)(4x² + 6x - 8)

Mathematics
1 answer:
mestny [16]4 years ago
4 0
(5x + 8)(4x^2 + 6x - 8)\\ \\ 5x(4x^2 + 6x - 8) + 8(4x^2 + 6x - 8) \\ \\ 20x^3 + 30x^2 - 40x + 8(4x^2 + 6x - 8) \\ \\ 20x^3 + 30x^2 - 40x + 32x^2 + 48x - 64 \\ \\ 20x^3 + (30x^2 + 32x^2) + (-40x + 48x) - 64 \\ \\ 20x^3 + 62x^2 + 8x - 64 \\ \\

The final result is: 20x^3 + 62x^2 + 8x - 64.
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On a particular road map 1/2 inch represents 18 miles about how many miles apart are 2 towns that are 21/2 inches apart on this
andrew-mc [135]
So if 1/2 = 18 miles, we want to first find how many sets of 1/2 are in 21/2. We can just do this by dividing.

(21/2) / (1/2) = 21

So we know that there are 21 sets of 1/2 in 21/2, and since 1/2 and 18 are equal, we can say we know there are 21 sets of 18.

We can multiply to find this.

21 * 18 = 378

So two towns are 378 miles apart.
6 0
3 years ago
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denis-greek [22]

Answer:

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y=0

Step-by-step explanation:

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Alekssandra [29.7K]
Since addition is commutative, she can add anyway she wants.
(17+51)+(10+13)
(51+10)+(17+13)
Hope this helps. 
5 0
3 years ago
Easy 10 points and brainliest :)
Snezhnost [94]

Answer:

quadrant 1

Step-by-step explanation:

both of them are positive

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Can someone please factor this 15x^2-17x-18
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