I think that the answer is -2. Hope this helps.
Total: 195 = x + (x+25)
195 - 25 = 2x
170 = 2x
85 = x
Therefore, there are 85 boys in 7th grade.
Answer:
This is english not math but.....
If it is warm outside, then it is summer.
Step-by-step explanation:
Basically just switch the terms and make it grammatically correct.
I think it is the Associative Property of Addition.
Answer:
1094
Step-by-step explanation:
The sum of terms of a geometric series is given by ...
Sn = a1·(r^n -1)/(r -1)
You want the sum for ...
a1 = 2, r = -3, n = 7
Filling in the numbers, we get ...
S7 = 2·((-3)^7 -1)/(-3-1) = 2(-2188)/(-4)
S7 = 1094
