Joseph earns $10 per hour working as a janitor. How much money will he earn if he works 9 hours?

90$

Step-by-step explanation:

let x = number of hours worked

let y = total money made

dollars per hour = 10

y=10x

x=9

y=10(9)

y=90

$90

Step-by-step explanation:

10*x(9)=90

10 = dollars an hour

x = hours worked