4 and 11.
The factor pairs of 20 are (20,1)(10,2)(5,4) None of them total -10 or differ by 10. -20 and 10 are factors of -20 that add up to -10.
The numbers are 9 and 7
4 and 9
20% off of $99 = $79.2 = 20% discount applied to $99 = $99 - (20% * $99) = $99 - (0.20 * $99) = $99- $19.8 = $79.2
580
20
26
-70
2 and 10
-12.385165 and -1.614835
-1540
20
-12
84
-58
-22