Answer:
The equation is
whose solution is 
Step-by-step explanation:
Let us call
the number of minutes the phone is used over 200 minutes, then we have
<em>(this says monthly bill of $40 plus the cost of phone usage over 200 minutes must equal $58 )</em>
This equation can be used to solve for
u as follows:



a. The events are mutually exclusive, so

b. For the same reason,

Another way to see this is to use the result from part (a), and the inclusion/exclusion principle:

and the right side reduces to 0.
c. Same as (b),

d. Same as (b),

We can also use the distributivity rule for unions and intersections to write

e. If the
is the complement of
, then by DeMorgan's law,

Answer: Y=-4x+7
Explanation:
1/2=36/72
8/9=64/72
A. 1/3=24/72
B. 7/24=21/72
☆☆☆☆☆☆☆☆☆C. 19/24=57/72
D. 22/24=66/24
(a) M1, M2, M3, H1, H2 and H3.
(b) possible outcomes are M1, M3, H2.
so probability = these outcomes / all possible outcomes
= 3/6 = 1/2 Answer