Answer:
69
Step-by-step explanation:
We are given the expression:
[tex] \displaystyle \large{10y - 7z}[/tex]
Evaluate the expression when y = 9 and z = 3; substitute y = 9 and z = 3 in the expression.
[tex] \displaystyle \large{10(9)- 7(3)} \\ \displaystyle \large{90- 21} \\ \displaystyle \large{69}[/tex]
