Answer:
B. Oxygen
Hope you got your answer! ☺️
Answer:
I, III and IV
Step-by-step explanation:
Required
Determine equivalent expressions to 
To do this, we simplify each of the given options.

Simplify like terms


<em>This is equivalent to the given expression</em>
<em></em>

Open Bracket



Collect Like Terms


<em>This is not equivalent to the given expression</em>

Open Bracket



Simplify Like Terms

<em>This is equivalent to the given expression</em>

Open Brackets


Simplify like terms

<em>This is equivalent to the given expression</em>
<em></em>
<em>Hence: I, III and IV are equivalent to the given expression</em>
Answer:
Step-by-step explanation:
10x+6x+35x+21=51x+21
Answer:
2 2/4
Step-by-step explanation:you first see how many times the bottom number goes into the top number, then you put the remainder in a fraction!!