I could figure it out if I was there I need a picture to help.
Answer:
B. ) 6^-7 = 1/6^7
Step-by-step explanation:
B.) is the only correct one
Just divide 78 with 11, 7.090909090909091.
Answer:
The simplified expression of (4-5r+8s)(5r-9) is
40r s-25r^2-72s+65r-36
(hope this helped)