3. Ajut-o pe Mara să completeze, cu încă patru termeni, sirul numerelor naturale:
987; 87.6;​

question:

could we have options?

what is the your question?

well, because the $0.25 is an added cost depending on how many minutes, the answer would be y = 30 + 0.25x.

secant-secant formula:

(whole secant) x (external part) =           (whole secant) x (external part)

(8+y-2) *8=                                           (y+4+6) *6

(y+6)*8 = (y+10) *6

distribute

8y+48 = 6y +60

subtract 6y from each side

2y +48 = 60

subtract 48 from each side

2y = 12

divide by 2

y = 6

sv =     (y+4+6)

sv   = 6+4+6

sv = 16