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BaLLatris [955]
2 years ago
9

4) Which expression is equivalent to 3x + 5x? X + 8 8x + 2. 8x. 2x​

Mathematics
1 answer:
____ [38]2 years ago
6 0

Answer:

8x

Step-by-step explanation:

3x + 8x are like terms which means they have the exact same variable.

To add like terms we add the coefficients which are 3 and 5.  

3 + 5 = 8  

We have 8 x's. So 3x + 5x = 8x.

In order to add terms, the variable part has to be exactly the same.

It's like saying 3 balls + 5 balls = 8 balls.

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Y is inversely proportional to the cube of x. If Y = 3 when x = 2, find Y, when x is 3. Write a proportion. Solve for y. Show wo
Wittaler [7]
<span>"Y is inversely proportional to the cube of x" translates to Y = kx</span>³ where k is unknown constant. We need to solve for k.

So we have Y = 3 and x = 2. Plug in and we get 3 = k2³ = 8k

So k = 3/8

Now we can solve for Y when x = 3

Y = (3/8)3³ = (3/8)27 = 81 / 8

Final answer: 81 / 8
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