Question

I need help can y’all help me please

Answer 1

Explanation:

Given, k(x) = x - 11

(a) We have to find the value of k(-4)?

Substitute the value of x = -4 in the expression,

`\hookrightarrow \: k( - 4) = ( - 4) - 11`

`\hookrightarrow \: k( - 4) = - 15`

________________________

(b) Given, k(x) = 11

It means value of expression (x - 11) is 11. Equating both sides to find x,

`\hookrightarrow \: k(x) = 11`

`\hookrightarrow \: x - 11 = 11`

`\hookrightarrow \: x = 22`

~The required answers are -15 and -22

Answer 2

k(- 4) = - 15 , x = 22

Explanation:

(a)

to evaluate k(- 4) , substitute x = - 4 into k(x)

k(x) = x - 11

k(- 4) = - 4 - 11 = - 15

(b)

we have k(x) = x - 11 and k(x) = 11

equating the 2 gives

x - 11 = 11 ( add 11 to both sides )

x - 11 + 11 = 11 + 11 ( simplify both sides )

x = 22