1/3-1/9-1/27 subtract be sure to reduce the answers

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total