Answer:
a=1 because 3x means 3 multiply 2 and it is substracted from 7 and 7-6 is 1
b=3
c=9
Step-by-step explanation:
hope you will understand from the explanation of a
Here is your answer for part A .06 and .006
Answer:
Option C is correct.

Step-by-step explanation:
Given the expression: 
Using properties of summation:
Using properties of summation in the given expression we have;
= 
=
Therefore, the following given expression uses the properties of summation to represents is, 
Consider such events:
A - slip with number 3 is chosen;
B - the sum of numbers is 4.
You have to count 
Use formula for conditional probability:

1. The event
consists in selecting two slips, first is 3 and second should be 1, because the sum is 4. The number of favorable outcomes is exactly 1 and the number of all possible outcomes is 5·4=20 (you have 5 ways to select 1st slip and 4 ways to select 2nd slip). Then the probability of event
is

2. The event
consists in selecting two slips with the sum 4. The number of favorable outcomes is exactly 2 (1st slip 3 and 2nd slip 1 or 1st slip 1 and 2nd slip 3) and the number of all possible outcomes is 5·4=20 (you have 5 ways to select 1st slip and 4 ways to select 2nd slip). Then the probability of event
is

3. Then

Answer: 
A solution of a function is where the function hits the x-axis, so if y is any number that is not equal to 0, there is no possible way that point can be a solution.
Hope this helps!