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option 1 is the answer

Step-by-step explanation:

Option 1 and 3

Step-by-step explanation:

= 0.7    this is true, two negative numbers divided becomes positive

-10 =     this is not true, for a negative fraction, you can keep the negative on the numerator OR the denominator, not both

=    this is true, the fractions are the same, the negative sign can be on either numerator or denominator

 =    this is not true, one side becomes positive

hope this helps

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)

this is answer of 144 cubic meters