Becky and tommy are asked to solve -4x-25=8x+15 identity where one of them made an error
2 answers:
Procedure to solve the equation in one variable
-4 x-25= 8 x+15
Taking variable on one side and constant on another side of equation
- 4 x - 8 x = 15 + 25(When one quantity goes on other side of equation , the sign preceding it changes)
- 12 x= 40
x =
By looking at the solution described above , you can find yourself who has done the mistake between Becky and Tommy and can also identify the error and rectify it.
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Given:
The table of values for the function f(x).
To find:
The values and
.
Solution:
From the given table, it is clear that the function f(x) is defined as:
We know that if (a,b) is in the function f(x), then (b,a) must be in the function . So, the inverse function is defined as:
And,
...(i)
Using (i), we get
Now,
Therefore, the required values are and
.
Answer:
Step-by-step explanation: