Will give out Brainliest, aTHX, a friend request, and will rate ur answer And don't just answer to get 5 little simple points!
THX

a. -1

b. 8

c. 3

Step-by-step explanation:

a.

6-7

(factor out the negative sign)

-(7-6)

(calculate)

-1

(your answer)

b.

6-(-2)

(remove the parentheses)

6+2

(calculate)

8

(your answer)

c.

6-3=3

2x^2+5x+17

your welcome. : )

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