The sum of all positive integers less than 400 which are divisible by 5. can someone give me the steps to do this?

Sum of all positive integers less than 400 and divisible by 5 is 15,800.

Step-by-step explanation:

TO FIND :

The sum of all positive integers less than 400 which are divisible by 5.

The set of positive integers  =  1,2,3, 4,5,6,7,.........,,

Now, the number should be divisible by 5.

SO, the desired set of positive integers =  { 5,10,15,20,.......}

Again the numbers are LESS than 400.

So, the desired set of positive integers =  { 5,10,15,20,....... 385,390, 395}

Here, First term a  = 5, common difference d  = 4 and last term an = 395

⇒There are total 79 terms in the series.

So, SUM OF 79 TERMS  =

Hence, The sum of all positive integers less than 400 which are divisible by 5 is 15,800.

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )