You have the original function as 2x-5
and you are given the value of x to be -1/2
Therefore, all you have to do is substitute the value of x in the function and calculate it as follows:
f(-1/2) = 2(-1/2) - 5 = -1 -5 = -6
11 blue
2 green
7 brown
total is 20 card
7 out of that 20 are brown
so x out of 100% are brown
7/20=x/100 - cross multiply
700=20x
x=700/20
x=70/2
Here is your answer
Convert the mixed fraction into into improper fraction.

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HOPE IT IS USEFUL
Answer:
It is an exponential function.
Initial value is - 1.8 and the base is 6.
Step-by-step explanation:
The function is given by
and it is an exponential function as the general form of an exponential function is
.
Here, if we put x = 0, the function becomes
.
Therefore, the initial value of the function is - 1.8.
In the general equation of exponential function
, b is called the base and x is the exponent.
Therefore, in our case the base of the function
is 6. (Answer)