a=13, d=?, n=15 , an=55 find the 'd'
Answers
Answered by
2
Answer:
d= 3
Step-by-step explanation:
a=13
n=15
an= 55
an= a+(n-1) d
55= 13+(15-1) d
55-13= 14d
42=14d
42/14=d
d= 3
Answered by
1
Answer:
d=3
Step-by-step explanation:
use the formula
an=a+(n-1)d
55=13+(15-1)d
55=13+14d
14d=55-13
d=42÷14
d=3
hope it helps
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