Question

find the sum of first 8 multiples of 15.
​

Answer 1

Answer:

15+30+45+60+75+90+105+120

45+45+135+195+120

90+320+120

90+440

530

Step-by-step explanation:

plzz follow me and Mark me as brainlest I want to became ace

Answer 2

Answer:

540

Step-by-step explanation:

15×1=15

15×2=30

15×3=45

15×4=60

15×5=75

15×6=90

15×7=105

15×8=120

here first term (a) is=15

and last term (l) is=120

and (n)=8

So, according to formula an=n/2(a+l)

an=8/2(15+120)

an=4(135)

an=540

Hence,the sum of first eight multiples of 15 is=540