In this order going from left to right:
Substitute 4 for g
Substitute 9 for f
9-4
5
Hope this helps!
1.B
2.B
im not sure about this one but ill have to say c sorry if im wrong on 3
4.A i think
A controlled variable is an element that remains unaffected and unchanged by other variables.
:)
Step-by-step explanation:
The last answer would be what your looking for !
Dont come for me if this is wrong, hoped I helped.
KINDEST REGARDS !
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