Casey spends $50 a week on entertainment. kelly spends 10% less than casey and megan spends $5 less than kelly. which expression represents how much megan spends? (w represents weeks

Step-by-step explanation:

Let w represents the number of weeks that they spent money on entertainment.

Casey spends $50 a week on entertainment. It means that in w weeks, Casey spends $50w

Kelly spends 10% less than Casey. The value of 10% is

10/100 × 50w = 5w

The amount that Kelly spends would be

50w - 5w = $45w

Megan spends $5 less than Kelly. Therefore, the expression that represents how much Megan spends would be

45w - 5

the answer is 1/4

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