Question

I need help with this arithmetic sequences !!!

Answer 1

???

Answer 2

I don't understand them in pre-cal & need help

Answer 3

so whats the question

Answer 4

A marathon is 26.2 miles. A runner begins training by running 3 miles on the first day. He increases his distance by 0.8 miles each day thereafter. How many days does it take for him to run the distance of a marathon?

Answer 5

i.e a=3
d=0.8

Answer 6

me not englishing well very but me answer know

Answer 7

me spanish talk ok

Answer 8

So how do I setup an expression?

Answer 9

a+ (n-1)d=26.2
ans 30

Answer 10

& yo hablo espanol lol