12 fewer means to subtract 12 so you would have h-12
-6/7 = -0.85
-31/50 = -0.62
So -0.62 is greater than -0.85
-0.62 < -0.85
Because the bigger the fraction is the less it actually is and I think the same goes for decimals . Hope I helped
Yes the value of X is 12.53 :)
Pythagorean theorem.
11•11=121+6•6=36=157
The square root of 157=12.53
The sum of n terms of a geometric sequence with first term "a" and common ratio "r" is given by

You have a=21, r=3, so the sum of 10 terms is

The appropriate choice is the 2nd one:
620,004
You have five numbers 
Among them there is one negative number
this number is smallest.
Note that

Since 6.25>6, then
and these numbers are less than 3
Note that
then
and these numbers are greater than 3.
Therefore, the correct order from the smallest to the greatest is:
