Question

Please help!! Write an expression to describe a rule for the sequance. then find the 100th term in the sequance 3,10,17,24,31,38,... (1point)
A: n+7;707
B: 7n;700
C: 7n-4;696
D: 6n-4;596

Answer 1

How fast?

Answer 2

you can take your time

Answer 3

let n be the term number
term 1, term 2, term 3
you know the sequence is adding 7 each time

so i wrote the 7 times table
and underneath is the sequence itself

now look at the table

n=1

to get from 1 to 7, we multiply by 7
to get from 2 to 14 we multiply by 7
etc

so we multiply n by 7
so we have 7n

now compare the 7 with the first term 3
compare 14 with the second term 10

find the difference
the difference is 7-3=4
14-10=4

so you have 7n-4

so your expression is
an=7n-4