Answer:
19404
Step-by-step explanation:
sum of arithmetic series is
Sn = n/2 (2a + (n-1)d)
or
Sn = n/2 (a + an)
a = 1st unit
an = last unit
d = difference
8-3 or 13-8 so d = 5
then first step is to find the value of n
an = a + (n-1)d
438 = 3 + (n-1)5
438 - 3 = 5n - 5
435 = 5n - 5
435 + 5 = 5n
440 = 5n
n = 440/5
n = 88
then we can find the sum
Sn = 88/2 (3 + 438)
S88 = 19404
Answer: 75
Step-by-step explanation:
a*1= 15*5
a= 75
The picture isn't loading so i'll answer based on what is shown.
If x-4=-2, then x is 2.
-7x+3 (hope this is the answer you are looking for)
Answer:
-5.2
Step-by-step explanation: