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3 years ago

Can you guys help me

Mathematics

1 answer:

ra1l [238]3 years ago

7 0

Answer:

x = 9

Step-by-step explanation:

9 to the sixth power = 531441

9 to the third power = 729

531441 = x cubed × 729

Divide by 729 on both sides.

531441 divided by 729 equals 729

729 divided by 729 equals 0

729 = x cubed

Find cube root

9x9x9 =729

Cube root of 729 is 9

x=9

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Flauer [41]

Answer:

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Step-by-step explanation:

in the equation replace x with the number from the table in the x colum then complete the equation

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3 years ago

"There are 15 questions on an exam. In how many ways can the exam be answered with exactly 8 answers correct?"

erastovalidia [21]

Answer:

The exam can be answered with exactly 8 answers correct in 6435 ways.

Step-by-step explanation:

The order is not important.

For example, answering correctly the questions 1,2,3,4,5,6,7,8 is the same outcome as answering 2,1,3,4,5,6,7,8. So we use the combinations formula to solve this problem.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

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The exam can be answered with exactly 8 answers correct in 6435 ways.

5 0

3 years ago

11= r/6<br><br> Doing math homework in class right now, can’t figure it out. Not good with fractions

Strike441 [17]

11 = r/6
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8 0

3 years ago

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What is 3 = -2v − v<br><br> v=

horsena [70]

Answer:

-1 =v

Step-by-step explanation:

3 = -2v − v

Combine like terms

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3 years ago

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Which equation has the solutions X=1 +-SQRT 5?

Vesna [10]

Answer:

D is correct. $x^2-2x-4=0$

Step-by-step explanation:

We are given the root of the equation

$x=1+\pm \sqrt{5}$

If we are given solution of the equation then find equation using formula.

If a and b are the solution of equation then equation would be (x-a)(x-b)=0

Here, $a=1+\sqrt{5} , b=1-\sqrt{5}$

Equation form would be $(x-1-\sqrt{5})(x-1+\sqrt{5})=0$

Now we simplify the above equation to get correct option.

$x^2-x+x\sqrt{5}-x+1-\sqrt{5}-x\sqrt{5}+\sqrt{5}-5=0$

$x^2-2x-4=0$

So, D is correct. $x^2-2x-4=0$

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4 years ago

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