Answer:
Step-by-step explanation:
Given
See attachment for circle O
Required
Find
The sum of angles in a semi-circle is 180 degrees.
So:
This gives:
Hence, the equation is:
If f(x) = (5x + 1) /2
Ok, you need to find inverse function, here's how...
1. Change "f(x)" to y, to make the calculations easier. y = (5x + 1) /2 2. Switch x and y: x = (5y + 1) /2 3. Solve for y: x = (5y + 1) /22x = 5y + 12x - 1 = 5y(2x - 1) / 5 = y 4. Change "y" to f-1(x) (2x - 1) / 5 = f-1(x) Now, plug in 8 for x to get the answer: (2*8 - 1) / 5 = (16 - 1) / 5 = 15/5 = 3
Hope this helps :)
Answer:
c letter is correct I think....
Answer:
The other solution of the system is
Step-by-step explanation:
Here, the given set of equations are: y = 2x -1 and
Now, to solve them put y = 2x -1 in the second equation, so we get
⇒
Also, by ALGEBRAIC IDENTITY :
So, implying above , we get
⇒
Now, ⇒x(5x-4) =0
So, either x =0, or x = 4/5
As (0, -1) is already a given solution:
So, when x = 4/5 ,put in equation (1)
y = 2(5/2) -1 = (3/5)
Hence, the other solution of the system is