Answer:
a = 18
Step-by-step explanation:
Rewrite the ratio as a fraction.
4a : 9 = 8 : 1
[tex] \frac{4a}{9} = \frac{8}{1} [/tex]
Cross multiply
(4a )(1) = (8)(9)
4a = 72
Divide both side by 4
[tex] \frac{4a}{4} = \frac{72}{4} [/tex]
