You want to be finding out what two factors (where one of them is a perfect square) has the produce of 63. It seems like 9 x 7 (9 is the perfect square) works.

The square root of 9 is 3 so we can just have

(which just means 3 times the square root of 7).
Answer:
quadrilateral
Step-by-step explanation:
The sum of two numbers will be zero when you have the same number and one is positive and one is negative. For example 1 + -1= 0
Answer:
B and C, only
Step-by-step explanation:
Answer:
176. Multiply 6 by 2 thirds.
Step-by-step explanation: