What is the greatest number that has one comma when written with numerals and with number names

An advertising firm has an old computer that can prepare a whole mailing in 6 hours. with the of newer model the job is complete in 2 hours. how long would it take the newer model to do the job alone?

If you have the following equation, 2/3x+5/6-x=2-3/4x what would you multiply each term by to get rid of all the fractions

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x