An electrician charges $75 for a house visit $50 an hour for service. What is the independent variable and what is the dependent variable

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

What expression is equivalent to 42x-56y

Which of the following describes the symmetry of the graph of y = x3?