The common difference, d, can be determined by subtracting the two consecutive values:
1 - 5 = -4
-3 - 1 = -4
-7 - -3 = -4
Then, using the equation:
an = a1+ d(n-1)
a_21 = 5 + (-4)(21 - 1)
a_21 = -75
The answer is letter D. I hope I was able to help you. Have a good day!
Answer:
683004.00
3854.93
Step-by-step explanation:
Answer:
4x+4
Step-by-step explanation:
Combine like terms:
3x+x= 4x
Add remaining terms (+4)
4x+4
