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:
LOL IT'S GONNA BE 80%
Step-by-step explanation:
HOPE THIS HELPS, SORRY FOR ALL THE CAPS
Answer:
he counted from 32 to 40 , and not to -40
Step-by-step explanation:
the difference is 72 degrees
Answer:
0.3 is the answer
Step-by-step explanation:
9514 1404 393
Answer:
x = -(9/7)n -81
Step-by-step explanation:
Subtract the n term.
x/-9 = 9 -n/-7
Multiply by -9.
x = -81 -(9/7)n
