Chase's math teacher finds that there's roughly a linear relationship between theamount of time students spend on their homework and their weekly quiz scores. Thisrelationship can be represented by the equation y = 72 + 64, where y representsthe expected quiz score and a represents hours spent on homework that week. Whatis the meaning of the y-value when 21?

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?

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years

The sides of a parallelogram are 24cm and 16cm. the distance between the 24cm sides is 8 cm. find the distance between the 16cm sides