Debra tutors history. For each hour that she tutors, she earns 20 dollars. Let E be her earnings (in dollars) after tutoring for H hours.
Write an equation relating E to H. Then use this equation to find Debra's earnings after tutoring for 19 hours

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 are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')