Me! 6 ÷ 1/4, 1 ÷ 9/10, 8÷ 9/12,. 8÷7/10. 2÷2/5,. 1÷1/6,. 9÷3/4 6÷4/5

i feel at this point

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?