Answer:

Step-by-step explanation:
<h2>Algebraic expressions</h2>
Difference: should be subtract.
N: should be a number.
Sum: Add
Therefore, the correct answer is 10-N=8+N.
Hope this helps!
The two long sides are 63meters and the shorter sides are 21meters.
Answer:
The coefficient is -5, and the base is 12.
Step-by-step explanation:
The coefficient is the number that the variable is being multiplied by in an expression, so -5 would be the coefficient in the expression
. The base would be the little subscript number that is next to the variable, so the base in the expression
is 12.