Peter lives in San Mateo. He bought an item for $528.9 and when the clerk calculated the sales tax it came out to exactly $55.67387. Round the sales tax to the nearest

Rearrange the formula c^2 = a^2 + b^2 for b

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

Find an equation of the line perpendicular to the graph.