Answer:

Step-by-step explanation:

The answer is:
Rounded to the nearest whole number, there are 40 electrons in an atom of Zirconium.
I hope this helps :D
Answer:
x = 15
Step-by-step explanation:
the 2 angles are a linear pair and sum to 180° that is
8x - 3 + 4x + 3 = 180
12x = 180 ( divide both sides by 12 )
x = 15
Answer:(12,-7)
Step-by-step explanation:
Yes! 8 - 3 is 5
so it is A.
It is not multiplied or divided by one single number so the sequence is arithmetic not geometric
hope this helps!