Kilogram is an SI unit for mass.
Ounce and pound refer to American system for measuring things, and decakilogram is not the "basic" unit, but kilogram is.
27x^2 - 42x + 12
3 is a common factor:-
= 3(9x^2 - 14x + 4)
That is the equivalent expression.
a
7
because 4a + 7 - 7
35 - 7
equals 4a
28
and 4a/4
28/4
equals a
7
<span>you could have 3.15=100 times 0.0315, 10 times 0.315.</span>