Answer:
[tex] \frac { 1 } { 2 } [/tex]
Step-by-step explanation:
We are given the following expression and we are to evaluate it when the value of a is 10 and b is -9:
[tex] \frac { 6 - b } { 3 a } [/tex]
Substituting the given values in the above expression to get:
[tex] \frac { 6 - (-9) } { 3 \times 10 } [/tex]
[tex] \frac { 1 5 } { 3 0 } [/tex]
[tex] \frac { 1 } { 2 } [/tex]
Therefore, the simplified form of the given expression that we get after evaluating it when a is 10 and b is -9 is [tex] \frac { 1 } { 2 } [/tex].