Erica, a sales clerk in a sporting goods store, earns a base salary of $1,500 per month plus a commission of 5 percent on monthly sales over $500. if erica received $1,700 for the month of july, how much were her monthly sales? a: $3,200 b: $3,700 c: $4,000 d: $4,500

What is the value of x? enter your answer in the box. photo attached.

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

What is the missing step in this proof ?