7*(60+3)=7*60+7*3= 420+21=441
Answer:

Step-by-step explanation:
The given function is
.
The domain refers to all values of x for which this function is defined.
Recall that: the domain of
is 
And we know
is the reciprocal of
.
Therefore the complement of the domain of
which is
is the domain of 
Answer:
Part A:
The probability that all of the balls selected are white:

Part B:
The conditional probability that the die landed on 3 if all the balls selected are white:

Step-by-step explanation:
A is the event all balls are white.
D_i is the dice outcome.
Sine the die is fair:
for i∈{1,2,3,4,5,6}
In case of 10 black and 5 white balls:






Part A:
The probability that all of the balls selected are white:


Part B:
The conditional probability that the die landed on 3 if all the balls selected are white:
We have to find 
The data required is calculated above:

Answer:
1. 4b+3b+15+4
2. 7b+19
Step-by-step explanation:
Both are equivalent expressions :))