How do i (F)ind the (R)atio in the( E ) probl(E)m ...points

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?

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers

How is the equation of this circle written in standard form? x2 + y2 - 6x + 14y = 142 a) (x - 3)2 + (y + 7)2 = 200 b) (x+ 3)2 + (y - 7)2 = 200 (x - 6)2 + (y + 14)2 = 142 d) (x+6)2 + (y- 14)2 = 142