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3 years ago

What number to the 3rd power makes 729?

Mathematics

2 answers:

Alika [10]3 years ago

8 0

9 to the third power is 729
9*9 = 81
81*9= 729

belka [17]3 years ago

7 0

?^3 = 729
⇒ ?= ∛(729)
⇒ ?= 9

The final answer is 9~

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Rufina [12.5K]

Answer:

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Step-by-step explanation:

Let:

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We need to eliminate one of the variables, so let's use elimination method. First multiply (1) by 2

$2*(1)\equiv\hspace{5}4x+2y=50$

Now subtract (2) from 2*(1) in order to eliminate x:

$2*(1)-(2)\\4x-4x+2y-3y=50-9\\-y=41$

Solving for y:

Multiplying both sides by -1

$y=-41$

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Solving for x:

add 41 to both sides:

$2x=66$

Multiply both sides by 1/2:

$x=\frac{66}{2} =33$

3 0

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