6. 7/3
8. 7/3
please don't get mad if these answers are wrong
Be E.N.D.bddndmmfmddndnxncnfnd

Rounding to nearest thousand gives 76,000 mg of chlorine
First answer (x=-2)
...
(2)[(-2)^2]+6-20
2(4)+6-20
8+6-20
14-20
<em>-6 (answer)
</em><em>
</em><em />Second answer (x=5)
...
(2)[(-5)^2]+6-20
2(25)+6-20
50+6-20
56-20
<em>36 (answer)
</em>Hope this helps!