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goldfiish [28.3K]
3 years ago
7

Which expression is equivalent to x4 • x−2?

Mathematics
1 answer:
damaskus [11]3 years ago
6 0
<h3>Hey there! </h3><h3>The second "x" is has  invisible 1</h3><h3>Here, this is what I meant: x^ 1</h3><h3>So, now your equation looks like this: x^4(x^1 -2)</h3><h3>Add the exponents: 4 + 1 = 5</h3><h3>Therefore your answer should be: x^5 - 2</h3><h3>(Note: there's many ways to solve these types of equations, I just gave you the basic method) </h3><h3 /><h3>Good luck on your assignment and enjoy your day! </h3><h3>~LoveYourselfFirst:)</h3>
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What is the y-value of the solution to the system of equations?
motikmotik

Answer:

{x = -3 , y=2  (Isolved for both variables be elimination)

Step-by-step explanation:

Solve the following system:

{3 x + 5 y = 1 | (equation 1)

7 x + 4 y = -13 | (equation 2)

Swap equation 1 with equation 2:

{7 x + 4 y = -13 | (equation 1)

3 x + 5 y = 1 | (equation 2)

Subtract 3/7 × (equation 1) from equation 2:

{7 x + 4 y = -13 | (equation 1)

0 x+(23 y)/7 = 46/7 | (equation 2)

Multiply equation 2 by 7/23:

{7 x + 4 y = -13 | (equation 1)

0 x+y = 2 | (equation 2)

Subtract 4 × (equation 2) from equation 1:

{7 x+0 y = -21 | (equation 1)

0 x+y = 2 | (equation 2)

Divide equation 1 by 7:

{x+0 y = -3 | (equation 1)

0 x+y = 2 | (equation 2)

Collect results:

Answer:  {x = -3 , y=2

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Help Please.. Write out mixed decimals using words.
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A student concluded that the solution to the equation sqrt2x+1 +3=0 is x=4. Do you agree? Why or why not?
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Just put 4 as x in the equation and solve it. The new equation is:

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Now we can solve it.

sqrt(2*4) becomes sqrt8:

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The sqrt of 8 is about 2.83.. so 2.83+4 is:

6.83

So we have 6.83 as the answer

but 6.83 does not equal 0 so x cannot equal 4

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Answer:

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I may be wrong been for ever since I did it on paper

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