Answer:
11 - 4
Step-by-step explanation:
as u explain it to me now i know how to solve the question. because its a number line, its easy to imagine.
hope this helps <3
To find the inverse of a function, replace the variable "x" with "y". Also replace "f(x)" with just "x". Solve this equation for y.
f(x) =2/3x+10
x=2/3y+10
Subtract 10 from both sides:
x-10=2/3y
Multiply both sides by "3/2":
(3/2)(x-10)=y
The inverse function is: f^-1(x)=3/2x- 15
Answer: y=-2x+9
Step-by-step: Subtract 2x from 2x+y=9 and get y=-2x+9
Factour ouf 3
f(x)=3(x²-9)
recognize diference of 2 perfect squres
a²-b²=(a+b)(a-b)
x²-9=x²-3²=(x+3)(x-3)
so
f(x)=3(x+3)(x-3)
seto to zero to find roots
0=3(x+3)(x-3)
0=x+3
-3=x
0=x-3
3=x
roots at x=-3 and 3