Cancel out units that you don't need and introduce those that you do with multiplication/division...
5lb(16oz/lb)(pots/10oz)=8 pots
Answer:

10/15 can be simplified to 2/3. Subtract 2/3 from both sides and you get 2/3=x
Answer:
(-4,1)
Step-by-step explanation:
for x you do:
1 - 5 = -4
for y you do:
4 - 3 = 1
so it is (-4,1)
Sq. rt 49t^4 * Sq. rt 2t= 7t^2sq.root 2t