Answer:
Step-by-step explanation:
3x+7y-2x+3y+7
group like terms
3x-2x +7y+3y +7
x+10y+7
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:
A
56000
700
Step-by-step explanation:
Calculate to determine that correct answer. there should be no remainder
Photo math is charging? We don't need it. We factor the difference of two squares.

Answer: 5t-50
Note that 80 is 16*5 and 96 is 16*6. Therefore, their sum is 16*5+16*6=16*(5+6), or 16*11. The sum is 176.