The quotient of 3 less than twice a number and 5 is equal to the sum of 4 and the same number divided by 2.

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.

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Aboard 60 in. long is cut two parts so that the longer piece is 5 times the shorter. what are the length of the two pieces?