Answer:
480
Step-by-step explanation:
Sn = n÷2 × (2a + (n-1)d)
n = 20 a = -14 d = 4
S20 = 10 × (-28 + 19 × 4) = 480
Answer: A
Step-by-step explanation: with my calculation, and the information you have give i have to say it is A.
Answer:
-2y^2 + y +32
Step-by-step explanation:
The variable with the highest exponent is y^2
Answer:
8.49
6.00
5.29
1.79
Step-by-step explanation: