How do we use unit rate on every day life? what does unit rate show

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

What is the value of the expression below? 148+(-6)| + |– 35= 7|

Darren earned $663.26 in net pay for working 38 hours. he paid $118.51 in federal and state income taxes, and $64.75 in fica taxes. what was darren's hourly wage? question options: $17.45 $19.16 $20.57 $22.28