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Mathematics 8 Online
OpenStudy (anonymous):

Need help with a Questions [inside]

OpenStudy (anonymous):

@campbell_st

OpenStudy (anonymous):

@ganeshie8

OpenStudy (willie579):

Hmm...

OpenStudy (willie579):

I'm guessing 4x = 64?

OpenStudy (willie579):

Idk. <:/

OpenStudy (freckles):

I say you have a cube that is 2 units high, 2 units deep, and 2 units wide... and x is number of cubic units... |dw:1447050842496:dw| can you count the number of little cubes that makes the 2 units high, 2 units deep, and 2 units wide cube?

OpenStudy (freckles):

if you have to get some building blocks to help you imagine

OpenStudy (anonymous):

8

OpenStudy (freckles):

right which is 2^3 right?

OpenStudy (anonymous):

yes

OpenStudy (willie579):

4 x 4 x 4 = 64. =|

OpenStudy (anonymous):

Would the answer to my questions be 4x=64?

OpenStudy (anonymous):

3x*

OpenStudy (freckles):

which one of those equations say x is 64?

OpenStudy (anonymous):

For the question that I asked, would the solution be 3x=64?

OpenStudy (freckles):

no x would be 64 divided by 3 there

OpenStudy (freckles):

we are looking for the equation that would give us x is 64

OpenStudy (freckles):

hint what is 4^3 equal to?

OpenStudy (anonymous):

4 x 16 = 64

OpenStudy (freckles):

\[4^3=64 \implies 4=\sqrt[3]{64}\]

OpenStudy (anonymous):

4^3 is equal to 64

OpenStudy (freckles):

where 64 is what they called x... \[4^3=x \implies 4=\sqrt[3]{x}\]

OpenStudy (anonymous):

So its the bottom right choice correct?

OpenStudy (freckles):

yes if I were to labeled these choices from A to D I would say choice D cube root of (x)=4

OpenStudy (freckles):

\[\sqrt[3]{x}=4\]

OpenStudy (anonymous):

Ok thanks so much for taking me through the steps and showing me. I appreciate it. Can you help with one more? I will start a new thread

OpenStudy (freckles):

k i will there in a few secs

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