Answer:
5
Step-by-step explanation:
-66
There will be $66 left after the $12 spent on lunch. 66 + -66 = 0
Answer: x= 10
-2497
Sn=n/2[2a+(n-1)d]
=22/2[2*-40+(22-1)d]
=11(2*-40+(21*-7)
= -2497