Answer:
A) 
B) 
Step-by-step explanation:
A) You can add these expression because they contain the same square root:
B) Same as above:
Answer:
The total length of the border is 
Step-by-step explanation:
we know that
The circumference of a circle is equal to
we have
assume
substitute
Answer:
r =45.5 units
Step-by-step explanation:
The diameter is twice the radius, or the radius is 1/2 the diameter
r = d/2
r = 91/2
r =45.5 units
Answer:
5x?=30 and ?x5=30
Step-by-step explanation:
First of, these 2 are both the same, and the communitive property applies to both.
The question example is in division, since the communitive prop. doesn't apply on division, it would be almost impossible to find another answer in division form. 5x? Is asking 5 times what equals thirty, so we are using what we know to figure it out. Sorry, I can't provide a good explanation :<
