Which expression is equivalent to -6x9y

-3(2x+3y)
-3(2x-3y)
3(2x-3y)
-3(2x+9)

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3? f(x) = (x + 3)2 + 3 f(x) = (x + 3)2 − 6 f(x) = (x + 6)2 + 3 f(x) = (x + 6)2 − 6