An item costs $39.99 and i paid $5.00 what percent was it off

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

What are different types of statistical programs

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample