Magnesium is an alkaline earth metal with an atomic number of 12. it’s in the third row in the periodic table. which expression shows one way to find the number of valence electrons in one atom of magnesium? a. 12x3 b. 12/3 c. (12-8)-2 d. (12-2)+8 or e. (12+2)-8

The answer is A.

Explanation: TRUST ME!

because it says use -2,0,and 2 for x, we can plug those numbers into the equation. y/4=3/4(-2)+2   y/4= -1 1/2 +2 now to get x by itself, we can multiply each side by 4. y=-6+8 which equals y=2 when x=-2. now you can do the same thing with 0 and 2 as x. you get y=8 when x=0 and y=14 when x=2.

x   |   y

-2 |   2

0   |   8

2   |   14

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2