Find the value of -8 + 9 · 2 ÷ -3. plz help i will do anything its math

In which way does nicotine cause addiction? by stimulating the brain’s pleasure center by increasing blood-sugar levels by decreasing dopamine levels by reducing depression and anxiety

George’s daughter was born with a hole in her heart. he met up with a group of individuals of questionable character who agreed to deliver to george a healthy heart that could be a transplant for his daughter for a sum of $20,000. the group george negotiated with failed to deliver the heart. george tried to sue when he did not receive the heart but was surprised when the courts would not enforce the agreement.can george force performance of this contract? why or why not? (10 points)will he be able to recover the $20,000 that he gave for the heart? why or why not? (10 points)

Which is shown to be an effective treatment for depression?