Given sequence:
-2,-7,-12 ,..
Unknown;
Find the sum of the first 20 terms = ?
Solution:
The sequence is -2,-7,-12 ,..
To find he sum of n-terms of a sequence, we use the expression below;
Sₙ = 
where n is the number of terms = 20
a is the first term = -2
d is the common difference= -7 - (-)2 = -5
Now input the parameters and solve;
Sₙ = 
Sₙ = 10(-4 + -5(19)) = 10(-99) = -990
The sum of the first 20 terms of the sequence is -990
23,24,and 25 because you do 3x+3=72.
72-3=69
69=3x
69 ÷3 is 23
x+1=24
x+2=25
~Jz
Hope it helps
Algebraically:
13 + (38/60) + (35/3600) = 13. 6431 degrees
If you have a graphing calculator ( I am using a TI-84 plus Silver Edition):
13(press 2nd -> apps -> 1) 38 (press 2nd -> apps -> 2) 35 (press alpha -> +) = 13.6431
Answer:
66%
Step-by-step explanation:
The method I use is putting 0/100 and 165/250 side by side. You multiply 100×165 and then divide that by 250.
So 16,500 ÷ 250 = 66
Answer:
4 letters XD
Step-by-step explanation:
you didn't attach a picture.
