Answer:
-9
Step-by-step explanation:
-9 x -9 x -9 = -729
-9 x -9 = 81 x -9 = -729
Answer:
$800
Step-by-step explanation:
Let the original price be $x.
75% reduction ----- 100% -75%= 25%
25%x= 200
Thus, the original price of the clothes dryer is $800.
The answer is D ! U just have to see the numbers the left corner
Answer:
Step-by-step explanation:
First, subtract by 7 both sides of equation.
Solve.
Then, divide by 12 both sides of equation.
Solve to find the answer.
, which is our answer.
Answer:
- f⁻¹(x) = (x + 1) / (x - 2)
- f⁻¹(1 ) = - 2
Step-by-step explanation:
<u>Given function:</u>
- f(x) = (2x + 1) / (x - 1)
<u>Find its inverse, substitute x with y and f(x) with x, solve for y:</u>
- x = (2y + 1) / (y - 1)
- x(y - 1) = 2y + 1
- xy - x = 2y + 1
- xy - 2y = x + 1
- y(x - 2) = x + 1
- y = (x + 1) / (x - 2)
<u>Substitute y with f⁻¹(x):</u>
- f⁻¹(x) = (x + 1) / (x - 2)
<u>Find f⁻¹(1 ):</u>
- f⁻¹(1 ) = ( 1 + 1) / (1 - 2) = 2 / - 1 = - 2
