150/250=75/125
THAT IS THE ANSWER
Answer:

Step-by-step explanation:
The expression is 
<u>We use the rule of exponents shown below to change the original to </u><u>"positive"</u><u> exponent form:</u>
<u>
</u>
<em>Now we can change the original expression given into positive exponent:</em>

1)a^7/a^4
=a^[7-4]
=a³
2) r²s⁴t/r²st³
=s⁴-¹.t¹-³
=s³.t-²
=s³/t²
3)3x^6/18x
=x^5/6
Answer:
-2x-2y-2z I think that is answer
Literally just replace the nine and four with ANY other numbers.