Tammy Scott-Hogan charges $350 a day to develop a personal training program for her clients. What amount did she earn last month if she worked 17 days?

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.

  or  

step-by-step explanation:

if the four friends split the cost, p, of the pizza evenly, then each friend pays one-fourth of the cost of the pizza.

the expression is   or  

most likely linear (proportionate)

step-by-step explanation:

as time increases heart rate increases