The function given is,

a) Domain
This is the set of all points over which a function is defined.
Therefore, the domain of the function is

b) Solving for the value of a
To solve for the value of a, the value of y = 0 at x = a
Therefore,

Solving for a

Collect like terms

Divide both sides by 3

Hence,
2/8, 2 Over 8 because all your doing is multiplying 1x2 and 4x2
6x = 4y - 8
4y = 6x + 8
y = (3/2) x + 2
Answer: Slope 3/2, y intercept 2
Answer:
$150,000
Step-by-step explanation:
The first step is to calculate the total number of units
= 2 +1 +2
= 5
If he buys at the rate of $30,000 for one unit then the total money spent on advertising can be calculated as follows
= 30,000 × 5
= 150,000
Hence the promoter spends $150,000 on advertising