Last year prom tickets were 65 dollars and this year they are 50 dollars. what is the percentage difference

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.