K(x)=½ x-10 find k(20)

Step-by-step explanation:

We have the function:

And we wish to find k(20).

So, substitute 20 for x and evaluate:

Hence, k(20) is 0.

And since it evaluates to 0, x=20 is the x-intercept of our equation.

y = 0.77(x)

step-by-step explanation:

the jacket retains this value after 23% cut or retains 77% of original value. plug original 87 jacket price for x and the remaining value should be y.