Help me (pre algebra by the way)

A, D, & F

Step-by-step explanation:

When you distribute, you get 6a + 5a + 5 - 3a + 21.

After combining like terms, you get 8a + 26.

Lastly, all you have to do is figure out which expressions are equivalent to

8a + 26.

A) 8a + 26 = 8a + 26

D) 6a + 5a + 5 - 3a + 21 (combine like terms) = 8a + 26

F) 2(4a + 13) - Simple distribution

2 x 4a = 8a

2 x 13 = 26

2(4a + 13) = 8a + 26

40 x 50 = 2000

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