An arithmetic sequence has t1 = 3, t2 = 10. find tn, sn.

see explanation

Step-by-step explanation:

the n th term of an arithmetic sequence is

= + (n - 1)d

given = 3 and = 10, then

= 3 + d = 10 ⇒ d = 10 - 3 = 7

= 3 + 7(n - 1) = 3 + 7n - 7 = 7n - 4

the sum to n terms of an arithmetic sequence is

= [2 + (n - 1)d ]

                        = [(2 × 3) + 7(n - 1) ]

                        = (6 + 7n - 7 )

                        = (7n - 1)

                        = n² - n

sorry

step-by-step explanation:

sorry, but im pretty sure its a now that i look at it

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock