Answer:
270
Step-by-step explanation:
For any arithmetic sequence
nth term is given by
nth term = a + (n-1)d
where a is first term,
d is common difference
d is given by nth term - (n-1)th term
sum of n terms given by
sum = n/2(2a + (n-1)d)
________________________________________________
Given arithmetic sequence
-2,0,2,4,6,8...
first term a = -2
lets take third term as nth term and second term as (n-1)th term to find common difference d.
d = 2 - 0 = 2
using a = -2 , d = 2, n = 18
thus, sum of first 18 terms = n/2(2a + (n-1)d)
=18/2( 2*(-2) + (18-1) 2)
=9 ( -4 + 34)
=9 ( 30) = 270
Thus, sum of first 18 terms is 270.
Answer:
+25
Step-by-step explanation:
(x+5)²=x²+10x+25
Where the heck is this bar graph at lol
Answer:
170 divided by 30 or calories divided by minutes
Step-by-step explanation:
the answer could be either but they both mean the same thing just in different words
Answer:
The distance, D for the given expression is 70 miles
Step-by-step explanation:
Given as :
D = r t
r = 35 mi/ h
t = 2 h
Now, According to question
Distance = speed × Time
Where speed = r
Time = t
Distance = D
Now, from question
D = 35 miles per hour × 2 hours
So, D = 70 miles
Hence The distance, D for the given expression is 70 miles . answer
