Answer:
a) False
b) False
Step-by-step explanation:
We are given the following information:
Z is a set of all integers,
is a set of all positive integers and
is a set of all negative integers.
Q is a set of all rational numbers,
is a set of all positive rational numbers and
is a set of all negative rational numbers.
N is a set of all natural numbers.
a) False
We will show this with the help of a counter example.

which is a rational number and not an integer.
b) False
We will show this with the help of a counter example.

which is a rational number and not a natural number.
3.141592654... It contains infinite numbers
Answer:
y=-1x-1
Step-by-step explanation:
Answer:
20500
Step-by-step explanation:
Every kilogram is 1000 grams,
You would times 20.5 by 1000 to get
20500 grams.
Let b>a...
b=2(a+4)
b=2a+8 then we are told that:
b-a=11 using b found above in this equation gives you:
2a+8-a=11 combining like terms on left side
a+8=11 subtracting 8 from both sides
a=3
So the smaller number is 3.
...
since b=2a+8
b=14
check..
b=2(a+4)
14=2(3+4)
14=2(7)
14=14
and
b-a=11
14-3=11
11=11