Answer:
Step-by-step explanation:
Find the sum of the first 42 terms of the following series, to the nearest integer.
2,7,12
Solution
The sum is given by
SUM_n=n/2*(a_1+a_n)
a_n=a_1+(n-1)d
a_1=2, n=42, d=5
The 42nd term is therefore given by
a_42=2+(42-1)5=207
SUM_42=42/2*(2+207)=21*209=4389
The sum of the first 42 terms of the series, therefore, is 4389
23. -7
24. greater. For example, when u subtract -5 from 10, the answer is 15, which is greater than 10
25. the pattern each term is subtracted 5 from it's previous term
Answer:
20%
Step-by-step explanation:
decreased score= 80-64 = 16
x% of 80 = 16
x=20
Answer:
1000000000000000000000+10000000000000000000000 :)
Step-by-step:
D cause that’s the answer
