Lisa has a job working for $16 per hour. She takes the bus to and from work, which costs a total of $3.50 each day she works. Since her work schedule varies she doesn't work the same number of hours or days each week. Which equation can be used to find m , the total amount in dollars Lisa earns in a month if she works d days and h hours?

m = 16hd - 3.50d

Explanation:

Earnings per hour = $16

Earnings per day = $16h

Where,

h = number of hours worked in a day

If she works d days

Lisa's total earnings = 16hd

Where,

h = number of hours worked in a day

d = number of days

Lisa's cost per day = $3.50

If she works for d days,

Total cost = 3.50d

If

m = total amount in dollars Lisa earns in a month if she works d days and h hours

m = 16hd - 3.50d

For example,

If h = 3 hours and d = 25

m = 16(3)(25) - 3.50(25)

= 1,200 - 87.5

= $1,112.5

m = 1,112.5