With this problem and explain it. you in advance. who ever answers and explains first receives brainliest. (8 x 4 x 2/8 x 7)^2 x (8^0/7^-3)^3 x 7^-9 a. 64/49 b. 8/49 c. 16/7 d. 512/7

Hello!
Your "8 x 4 x 2/8 x 7" needs a bit of work to become clear.  Please use " * " to indicate multiplication, not " x, " which used to represent an unknown quantity.
 
                                           2
(8 x 4 x 2/8 x 7_ => (8*4* * 7) is my interpretation of what you typed.
                                           8

This simplifies to (4*2*7), or (56).

Would you please treat "8^0/7^-3" in the same way.  For 7^-3  please substitute:

                                                   1
                           7^(-3) or     
                                                   7^3
                                                                                              1
Similarly, your "7^-9" should be rewritten as    7^(-9) or   
                                                                                              7^9.

Try to get all of your exponents to be +

See what you can do with this info.  If you write back I'd be happy to comment.

The variables should add up to equal 1

20 percentage, you can also do it on a calculator.