(0.5x - 0.6) + (0.75x - 0.1)

1.25x-0.7

Step-by-step explanation:

0.5x−0.6+0.75x−0.1

=0.5x+−0.6+0.75x+−0.1 Combine Like Terms:

=0.5x+−0.6+0.75x+−0.1

=(0.5x+0.75x)+(−0.6+−0.1)

=1.25x+−0.7

=1.25x−0.7

i would go with the first one

step-by-step explanation:

hope this

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560