Let
![x](https://tex.z-dn.net/?f=x)
be the width of the rectangle.
Since the perimeter of this rectangle is 100, then the height of the triangle must be
![50-x.](https://tex.z-dn.net/?f=50-x.)
Both width and height are positive numbers, so we must have
![x>0~~\text{ and }~~50-x>0\\\\ x>0~~\text{ and }~~50>x\\\\ 0](https://tex.z-dn.net/?f=x%3E0~~%5Ctext%7B%20and%20%7D~~50-x%3E0%5C%5C%5C%5C%20x%3E0~~%5Ctext%7B%20and%20%7D~~50%3Ex%5C%5C%5C%5C%200%3Cx%3C50)
There are infinity real numbers that are greater than zero and less than 50. Therefore, there are infinity rectangles having a perimeter of 100.
![\bullet~~](https://tex.z-dn.net/?f=%5Cbullet~~)
width:
![x](https://tex.z-dn.net/?f=x)
<span>
![\bullet~~](https://tex.z-dn.net/?f=%5Cbullet~~)
</span>height:
![50-x](https://tex.z-dn.net/?f=50-x)
![0](https://tex.z-dn.net/?f=0%3Cx%3C50)
(You can pick any real number between
![0](https://tex.z-dn.net/?f=0)
and
![50](https://tex.z-dn.net/?f=50)
for the
![x](https://tex.z-dn.net/?f=x)
value )
I would answer this question by addressing the opposite. A rate is any number that indicates amount of anything per unit time. The essential detail here is rates always express how fast a thing could go. Therefore, any parameter that does not indicate amount of time is a non example of a rate.
Answer:
A. The function is linear and is growing by equal differences over equal intervals.
Here, let the age of student be x and teacher be 4x after 28 years, the teacher is double the age of student. So the age of teacher will be 4x+28 and student will be 2(x+28)
So,
4x+28=2(x+28)
4x+28=2x+56
4x-2x=56-28
2x=28
x=14
Therefore the age of the teacher in present will be
=4x+28
=4*14+28
=84
And age of student will be:
=x+28
=14+28
=42
Hope this helps
Answer:
45
+ 226
+ 79
Step-by-step explanation: