68 more than the quotient of an unknown number and 54 is 72

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?