If a number is rational it means, it can be written in the form of 
, where q≠0 and p and q can be any integers.
There are following properties possessed by Rational numbers
1. Decimal representation of Rational numbers are either terminating or non terminating repeating i.e if the denominator is of the form 
where m and n are any natural number.
2. Addition ,Subtraction ,Multiplication and Division of two rationals is always Rational.
3. The sum or difference of rational and irrational is always irrational.
Answer:
Answered below.
Step-by-step explanation:
1) A double - blind study is simply an experiment in which neither the participants nor the people who carry out the experiment know who is receiving any particular treatment. This method is usually used in order to prevent a biased view in research results.
2) True because randomized simply means that subjects were assigned to the group randomly.
3) Placebo - controlled trial simply means that there was a control group that received only a placebo treatment which is mainly designed not to have real effect.
Answer:
x=-13
Step-by-step explanation:
divide 52 by -4 to get x=-13
Answer:
x=12
Step-by-step explanation:
LM + MN = LN
2x-16 + x-9 = 11
Combine like terms
3x-25=11
Add 25 to each side
3x-25+25 = 11+25
3x = 36
Divide by 3
3x/3=36/3
x = 12
