The number of permutations of the 4 different letters, taken two at a time, is given by:
Answer:
To find a, b, and c, rewrite in the standard form ax2+bx+c=0ax2+bx+c=0.
a=1, b=3, c=0
Answer:
Step-by-step explanation:
60% = 7.2/12
83% = 10/12
He improved by a supposed 23%
Step-by-step explanation:
Since, y varies directly as x:

A . Because one you make the ratio 80:48 you simplify (divide until you can divide anymore ).