For sake of convenience, reverse the series, then it would be:
21,19,17.....7
a=21, d = -2,
s(4) = 4/2 (21+15)
s(4)=2(36)
s(4) = 72
Answer:
Step-by-step explanation:
f(x)= (x - 3)(x - 5)
f(x) = x^2 - 5x - 3x + 15
f(x) = x^2 - 8x + 15
Answer is A
I believe it’s correct, but i’m not smart
Each number is added by 3 so it's 17 20 23 26 29 32 35 38 41 and so on.
Answer:
2
Step-by-step explanation:
25+5*? = 35
? = 2