4. Which is the formula to calculate the probability that all of a set of Independent events occurs? P(A or B) = P(A) + P(B) P(A and B)
P(A and B) = P(A). P(B)
PA and B)
P(A)
P(BA). P(A) = P(A and B)

i honestly dont know

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