Answer:
The answer is
.
Step-by-step explanation:
This is because when you multiply them together you get
,
,
, and 
When you add the like terms you get,

Answer:
Step-by-step explanation:
A
Answer: Sample response: 50% is a friendly percent. You can divide 120 by 2 to find the answer. 120 divided by 2 is 60. So, 60 students were 7 years old when they lost their first tooth.
Sure.
A square root is the number or factor that, when multiplied by itself, will equal the number.
For example:
√49 = 7 (read as "the square root of 49 equals seven"
7 * 7 = 49 (read as "seven times seven equals 49"
7^2 = 49 (read as "seven squared equals 49"
Using an exponent and raising a number to the power of 2 squares it, which multiplies it by itself.
It is helpful to memorize all square roots up to 144, which is 12.