An item cost $4 before tax and 4.32 after sales tax. what is the sales tax rate

What is the difference between regular convex and concave polygons

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

What statement is true? 2x^2-9x+2=-1