Tell whether each sequence is arithmetic or geometric and determine the 11th term. (a) 3, 10, 17, 24, ... arithmetic or geometric? 11th term: (b) 4, 12, 36, 108, ... arithmetic or geometric? 11th term: (c) -20, -24, -28, -32, ... arithmetic or geometric? 11th term:

Step-by-step explanation:

(a) 3, 10, 17, 24, ...

d=10-3=17-10=7 then it is arithmetic sequence

a(n) = a +(n-1)d

a(11) = 3 +(11-1)7

       =73

(b) 4, 12, 36, 108,

r=12/4=36/12=108/36=3    

So it is geometric

By using this equation:

and we have a(1)=4 , r=3    

a(11)=4*(3)^(11-1)

      =236196

(c) -20, -24, -28, -32, ...

d=-24+20=-28+24=-4 then it is arithmetic sequence

a(11) = -20 +(11-1)-4

       =-60

hope this helps

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500