A(n)=a+(n-1)d
A(40)= -1+(40-1)-4
A(40)= -1+39(-4)
A(40)= -1+(-156)
A(40)= -157
Answer: B
Step-by-step explanation: if 24 to 16 is 3:2 then because this is directly proportional it would be that x is 6:4
Answer: the answer is 164025
Step-by-step explanation:
62=2×31
82=2×41
so the answer is 2
No, when you give someone points for answering your question it takes them from you but when you give someone brainliest it doesn't take the ones you recieved already for some reason