Question

@dumbcow help ? Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule.
a(n)=-3+(n-1)(-2.2)

Answer 1

well since they already give you the rule
plug in n = 1,4,10 and see what you get for each one

Answer 2

–3, –9.6, –22.8
–2.2, –11.8, –19.8
–3, –11.8, –25
0, –6.6, –19.8

Answer 3

lol yes those are answer choices

what do you get when you plug in n=1, n=4, and n=10

Answer 4

how do you plug it in i think my method is wrong

Answer 5

ok if n=1 , then n-1 = 1-1 = 0
right

Answer 6

yes

Answer 7

-3 + 0*-2.2 = ?

Answer 8

i had that before okay so im right do i have to divide

Answer 9

hmm no theres no division sign
multiply by 0, what do you get?

Answer 10

youll get zero

Answer 11

yep
-3 + 0 = -3

Answer 12

okay

Answer 13

now try n=4

step 1: subtract 1
step 2: multiply by -2.2
step 3: add -3