Answer:
That i will be happy to know that i don't now and silicon is a element
Step-by-step explanation:
B - 7x = a - b
Subtract b from both sides.
-7x = a - 2b
Divide both sides by -7.
x =
Answer:

Step-by-step explanation:

Answer:
It is 30 because it is the only one that makes sense if you do the math
Answer:
A
Step-by-step explanation:
Range is all y values of a graph and seeing that it has no arrows means its not infinite so its not B. The graph starts at 0 and ends at 5 so the smallest value is 0 and the largest is 5 therefore making the answer A.