Which expressions are equivalent to 1/81 ? check all that apply.
8^ -1
9^ -2
9^ 8/9^4
9^8/9^10
9^ -6 · 9^3
9^5 · 9^ -7

Step-by-step explanation:

Let's evaluate the answers.

Think of numbers with negative exponents as numbers on the wrong side of the fraction. So if you have a negative exponent, you put it at the bottom of the fraction or up and then you remove the negative sign.

So let's take the first

Now the next one, according to the law of exponents, when dividing we subtract the exponents. (But this only applies if the coefficients are the same!)

Applying this rule to the second

The third one:

If you apply the same rules to the rest of the choices, you wil find that they are not equivalent to 1/81.

answer: it's a

step-by-step explanation:

in the math equation 8 x 7 = 56, the 8 and the 7 are both factors of 56, since in this lesson we will use square tiles to figure out the factors of a whole find as many different arrays as you can, but follow one important rule: all the rows must have the i can make two rows of nine, so 2 and 9 are both factors of 18.

step-by-step explanation: