Which expressions are equivalent to ? check all that apply.

Well, we know x^(1/2) = √(x^1)

so, by that logic we know when a number n is raised to some fraction(x/y) then the numerator is the number n is raised to under the (denomenator) yth root.

So, the third root of 128^x= 128^(x/3)
Also, if we divide 128 by 4^3(64) we get 2. doing this allows us to put 4 outside the 3rd root and leave 2^x under the third root.

I would say the first, 3rd, and 4th answers should be correct and all equivilant to the third root of 128^x. (raising a number to (1/3) is = to taking the 3rd root of that number. this is why 3&4 are both equal)

The answer is 90 % because since 20 multiplied by 5 is 100 you would have to do each question multiplied by 5 so 18 times 5 equals ninety percent.

Viewed your profile and found this question. what are your options for this question? maybe i can with this unless it's overdue or it's already out of the way.