What is the sum of all multiples of 4 between 10 and 30?

12 + 16 + 20 + 24 + 28 = ?

I don't know I need help

To find the sum of all multiples of 4 between 10 and 30, we can follow these steps:

1. Determine the first multiple of 4 within the given range.
- The first multiple of 4 greater than or equal to 10 is 12.

2. Determine the last multiple of 4 within the given range.
- The last multiple of 4 less than or equal to 30 is 28.

3. Find the number of terms between the first and last multiples of 4, inclusive.
- The number of terms is (last term - first term) / common difference + 1.
- The common difference between consecutive multiples of 4 is 4.
- In this case, (28 - 12) / 4 + 1 = 17.

4. Find the sum of the arithmetic series using the formula:
- Sum = (n/2) * (first term + last term)
- where n is the number of terms.
- In this case, the sum = (17/2) * (12 + 28) = 289.

Therefore, the sum of all multiples of 4 between 10 and 30 is 289.