If I perform 20 J of work winding a spring loaded car that provides a 5 N force over 3 m, what is the efficiency of this machine?

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq

Find the measure of angle c in the following triangle.

Marshall went to the state fair and bought 3 tickets. each ticket to the fair cost x dollars. after he bought the tickets, he had $3.25 left in change. write an expression that represents the amount of money, in dollars, that marshall had before he bought the tickets. n