Question

what is the sum of the first 10 odd multiples of 3?



pls answer with explanation​

Answer 1

Answer:

165

Step-by-step explanation:

1 x 3 = 3

2 x 3 = 6

3 x 3 = 9

4 x 3 = 12

5 x 3 = 15

6 x 3 = 18

7 x 3 = 21

8 x 3 = 24

9 x 3 = 27

10 x 3 = 30

Answer 2

Answer is 300

Step-by-step explanation:

3,9,15,21,27,33,39,45,51,57

a2-a1=9-3=6

d=6

a=3

n=10

l=57

sn=n/2(a+l)

=10/2(3+57)

=5(60)

=300