Answer:
40
Step-by-step explanation:
[tex] \dfrac{ab^2 - 5}{10} [/tex]
a = 5; b = 9
First, substitute 5 for a and 9 for b.
[tex] \dfrac{ab^2 - 5}{10} = [/tex]
[tex] = \dfrac{(5)(9)^2 - 5}{10} [/tex]
[tex] = \dfrac{(5)(81) - 5}{10} [/tex]
[tex] = \dfrac{405 - 5}{10} [/tex]
[tex] = \dfrac{400}{10} [/tex]
[tex] = 40 [/tex]
