Perimetrul unui triunghi isoscel este egal cu 20 dm. Determinați lungimea înălțimii corespunzătoare bazei, dacă lungimea uneia
dintre laturile congruente este de 2 ori mai mare decât lungimea
bazei.​

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

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?

Tim open up a new saving account with a $50 deposit and plant to deposit $20 per week into the same account. write an expression to represent the total amount in his savings account.