John charges a fee of $50 to figure out what is wrong with a customers car. then he charges $75 per hour to fix the car. if john charged a customer $237.50 how long did he work on the car? please answer fast.

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.

There are a total of 75 students in the robotics club and science club. the science club has 9 more students than the robotics club. how many students are in the science club?