Answer:
you are multiplying by 7
Step-by-step explanation:
so like 3 x 7 = 21
4 x 7 = 28
6 x 7 = 42
9 x 7 = 63
10 x 7 = 70
hope it helps
Answer:
1785.71429% or ~1785.71%
Step-by-step explanation:
to find this answer you must divide 56 mm by 1 m
1 m is also 1000 mm
so
1000 / 56 is what you need to do
1000/56 = 17.8571429
your percentage is essentially 1785.71429%
168 prime numbers exist between 1-1000.
The work is actually unrelated to math, so I won't bother posting the explanation. However, I can give some detail as to how I did it. If you know how to program, you can set up a simple for loop for all numbers 1-1000, and have a check function that checks if the number is prime or not.
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.
