(7a^2 -a + 4) – (3a^2 - 4a - 3)

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.