Question

what is the sum of first 10 terms and next 10 terms of arithmetic sequence 10 15 20 25​

Answer 1

Answer:

275

Step-by-step explanation:

Following numbers

5

10

15

20

25

30

35

40

45

50

We can see that

5 + 50 = 55

10 + 45 = 55

15 + 40 = 55

We can see that all add too 55

Thus

5 * 55 = 275

Please check before blindly copying thanks!