At work marlena has to sell a minimum of 50 books a week. when she sells more than 50 books she earns a bonus of 50 cent per book. this week her bonus was 35.50$. which equation and value for y can be used to find out how many books marlena sold

a) Equation Y=0.50(x-50)

b) Marlena sold 121 books

Step-by-step explanation:

Each book Marlena sells above 50 she earns $0.50 of bonus. If she sells less, no bonus is earned, so if x is the number of books sold and y is the amount of the bonus earned:

y = 0.50 ( x - 50 )    x > 50

If we know she earned a bonus of y = 35.50, we must calculate x from the above equation:

35.50 = 0.50 ( x - 50 )

x - 50 = 35.50 / 0.50 = 71

x = 50 + 71 = 121 books

Marlena sold 121 books

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

nope.   happens to me as well.

-aparri