Which expression is equivalent to 3^7•3^-4

3^3 which is = 27

Step-by-step explanation:

When multiplying exponents with the same base, you just add the exponents and keep the same base.

3^7 * (1/3)^4 because a^(-n) = (1/a)^n

Step-by-step explanation:

because a^(-n) = (1/a)^n

but which class are u may know that first

step-by-step explanation:

for exempl this   system of equations   y = x - 3

                                                                y = 2x - 5

look   the line : y = x -3     ( red)

                            the line : y = 2x -5 ( bleus)