Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks. Two students in the same Spanish class, Chloe and Diane, plan to get together after school to make vocabulary flashcards. Chloe started on the project yesterday and has already made 5 flashcards. Diane hasn't started yet. Since Chloe makes 4 flashcards per minute and Diane makes 9 flashcards per minute, Diane will soon have the same number of flashcards. How many flashcards will each student have at that point? How long will that take?

Chloe and Diane will each have BLANK
flashcards in BLANK
minutes.

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

Select the correct answer and solve for y