Answer:
Given: f(x)=\dfrac{1}{9}(x-2)
We need to find the inverse of f(x).
Step 1: Set f(x) = y
y=\dfrac{1}{9}(x-2)
Step 2: Switch x and y
x=\dfrac{1}{9}(y-2)
Step 3: Solve for y, Isolate y
x=\dfrac{1}{9}(y-2)
Multiply by 9 both sides
9x=y-2
Add 2 both sides
9x+2=y
y=f^{-1}(x)
Hence, f^{-1}(x)=9x+2
Step-by-step explanation:
If his best time is x, and the best time is smaller, then (1+1/3)*x=his second best time. If x+4=his second best time (since his second best time is 4 seconds slower), then (1+1/3)*x=x+4. Multiplying it out, we get (3/3+1/3)*x=x+4
=4x/3=x+4. Subtracting x from both sides, we get 4x/3-3x/3=x/3=4. Multiplying both sides by 3, we get x=12=his best time
Answer: the first one would be four then that times 3 would be 12 which is 2 and then 4 times 5 is 20 which would be the third then you could add to check and you would get 36
Step-by-step explanation:
1.First multiply 4(2y) and 4(6) which gives you (8y-24).
2.Then write out the whole problem: (15y-8y-24).
3.Subtract 15y-8y first since they have equal terms. That will give you 7y.
4.Now you have (7y-24).
Hoped this helps!!:-)))
X1 + X2 + X3 <27 for all Xi> 0
X1 + X2 + X3 <27 for all Xi> 0, X2 >/ 5