Answer:
A
Step-by-step explanation:
because 1/9^2 is also 9^-2 because when it is a negative exponent it turns into a fraction. it does this because it is negative and the negative is equal to the number of one with the exponent positive
The answer would be slope
10+10=20, 15+5=20 Those are both addition sentences that have a sum of 20.
