1. 3+(-20)= 2. (-8)-12=

3.(-15)-(-10)=

4.(-19)+18=

show your work

1. -17

2. -20

3. -5

4. -1

Step-by-step explanation:

I would show u the work but u need to pay attention in class and ask for help ;))

1. -17

2. -20

3. -5

4. -1

hope helps~

the answer will be b x² +x-1

step-by-step explanation:

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