Answer:

Step-by-step explanation:
Given

Required
Determine the inverse function

Make F the subject of formula:
Multiply through by 9

Add 32 to both sides

Divide through by 5


Hey there!
Let's create a systems of equations with x and y to find our numbers.
x=5y
x-y=1480
Let's plug our x value into the second equation.
5y=y=1480
4y=1480
y=370
Now we multiply this number by five as the first equation says to get our x.
x=1850
Our numbers are 1850 and 370.
I hope this helps!
Answer:
m=6/7
Step-by-step explanation:
20/100 = 0.20
0.20 * 9 = 1.8
9 - 1.8 = 7.2
The sale price of the DVD is $7.20.