Answer:
5040
Step-by-step explanation:
The given series is :
24 + 48 + 72 + 96 +...+ 480
The first term, a= 24
Common difference, d = 24
The last term, 
Let there are n terms in the AP.
So,

There are 20 terms in the series. The sum of 20 terms is :

So, the sum of the given arithmetic series is equal to 5040.
Answer: It's A. -7.
Step-by-step explanation: I've attached an Image of my work.
Answer:
1 1/2
Step-by-step explanation:
Hope this helps you pass your quiz :>
Answer:
You donf have the picture shown, how is anybody supposed to work on it