Answer:
Two questions:
Question 1:
given
.
Answer 1: 
Question 2:
given
.
Answer 2: 
Step-by-step explanation:
So
is used in most classes to represent the inverse function of
.
The inverse when graphed is a reflection through the y=x line. The ordered pairs
on
implies
are on
.
This means we really just need to swap x and y.
Since we want to write as a function of x we will need to solve for y again.
Question 1:

Swap x and y:

We want to solve for y.
Add 3 on both sides:

Make the left hand side a fraction so we can cross-multiply:

Cross multiply:

Simplify right hand side:

Divide both sides by (x+3):

So
.
Question 2:

Swap x and y:

Make left hand side a fraction so we can cross multiply:

Cross multiply:

We have to distribute here:

Add 3x on both sides:

Divide boht sides by x:

You could probably stop here but you could also simplify a little.
Separate the fraction into two terms since you have 2 terms on top bottom being dividing by x:

Simplify second fraction x/x=1:

So
.
Answer:
10/81
Step-by-step explanation:
let,
y=kx
y=10 when x=9
so,
10=k×9
or, k=10/9
when x=1/9
y=kx
or, y=(10/9)×(1/9)
or, y=10/81
Do the multiplication first PEMDAS
Answer: Our required linear equation would be 
Step-by-step explanation:
Since we have given that
Cost of deep fried bananas on a stick = $1.00
Number of sales reached = 100 per day
Cost of deep fried bananas on a stick becomes = $2.00
Number of sales reached = 52 per day.
Let x is the number of dollars each.
Let y be the number of vendors sale.
So, we need to form the linear equation:
As we know the formula for two point slope form:

Hence, our required linear equation would be 