6x^5y^2z^3+ 10x^3yz^7 -20x^4z^3

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

[15 points, algebra 2]simplify the complex fraction and find the restrictions.

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?