Answer: 4:1
Step-by-step explanation:
Given:- Number of tables in the classroom=6
Number of students on each table = 4
thus number of students in the classroom =6×4=24 students
Now ratio of numbers of students to the tables in the classroom= numbers of students/tables in the classroom=24/6=4/1=4:1
Ratio of numbers of students to the tables in the classroom= 4:1
![n(X\cup Y)=n(X)+n(Y)-n(X\cap Y)](https://tex.z-dn.net/?f=n%28X%5Ccup%20Y%29%3Dn%28X%29%2Bn%28Y%29-n%28X%5Ccap%20Y%29)
If
![X](https://tex.z-dn.net/?f=X)
and
![Y](https://tex.z-dn.net/?f=Y)
share no common elements, then
![n(X\cap Y)=0](https://tex.z-dn.net/?f=n%28X%5Ccap%20Y%29%3D0)
, which means
![n(X\cup Y)=n(X)+n(Y)=47](https://tex.z-dn.net/?f=n%28X%5Ccup%20Y%29%3Dn%28X%29%2Bn%28Y%29%3D47)
On the other hand, if the smaller set is entirely contained within the larger set, i.e.
![Y\subseteq X](https://tex.z-dn.net/?f=Y%5Csubseteq%20X)
, then
![X\cap Y=Y](https://tex.z-dn.net/?f=X%5Ccap%20Y%3DY)
, and so
![n(X\cup Y)=n(X)+n(Y)-n(Y)=n(X)=28](https://tex.z-dn.net/?f=n%28X%5Ccup%20Y%29%3Dn%28X%29%2Bn%28Y%29-n%28Y%29%3Dn%28X%29%3D28)
.
Answer: Unit rate is used to compare quantities in which the second quantity is one.
Ok
the sets are
natural numbers (or counting numbers), this is like 1,2,3,4,5 etc
whole numbers, this is including 0, so 0,1,2,3,4,5,6 etc
integers, this includes the previoius set and negatives, so -3,-2,-1,0,1,2,3,4,5 etc
rational numbers, this is the set of numbers that can be written in form a/b where b≠0, so all integers can be written like this, like example -3=-3/1, so -7/9 belongs here
-7/9 goes in the rational set
Answer:
The area is 8000 square feet.
Step-by-step explanation:
Since one inch in the drawing is equal to 20 feet, multiply 4 by 20 to get the length in feet. So the length equals 80 feet. Then multiply 5 by 20 to get the width. So the width equals 100. Finally plug the width and the length into the formula for Area. A= length X width; A= 80 X 100; A= 8000