Question

Can someone help me please​

Answer 1

See pic for solution

Answer 2

First question;

f(-1) implies that x = -1, therefore; x < 0

`{ \tt{f(x) = 5x - 10}} \\ { \tt{f( - 1) = 5( - 1) - 10}} \\ = { \tt{ - 5 - 10}} \\ { \underline{ \tt{ \: \: f( - 1) = - 15 \: \: }}}`

Second question;

f(0) implies x = 0, therefore; x ≥ 0

`{ \tt{f(x) = 5x - 20}} \\ { \tt{f(0) = 5(0) - 20}} \\ { \underline{ \tt{ \: \: f(0) = - 20 \: \: }}}`

Third question;

f(2) implies that x = 2, therefore; x ≥ 0

`{ \tt{f(x) = 5x - 20}} \\ { \tt{f(2) = 5(2) - 20}} \\ = { \tt{10 - 20}} \\{ \underline { \tt{f(2) = - 10}}}`