Given that R = 9 x + 8 y Find x when y = 8 and R = 4

-20/3 = x

Step-by-step explanation:

Substitute the values that you were given in for the variables:

4 = 9x + 8(8)

4 = 9x + 64               -   Subtract 64 from both sides

-60 = 9x                    -   Divide both sides by 9 to get x by itself

-60/9 = x                   -   Simplify

-20/3 = x

450

step-by-step explanation:

you get texts and minutes, so why not

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