Answer:
Step-by-step explanation:
Given: Perimeter of triangle= 72 units
Measure of one of the side= x units
Measure of second side = 3x units
We know the perimeter of triangle is equal to sum of all sides.
Now, finding the possible value of x
forming an inequality to determine the value of x
Remember triangle has three sides, however, measure of only two sides are given.
⇒ 
⇒ 
Dividing both side by 4
⇒ 
∴ The inequality to represents all possible values of x is
This means that if b doubles, then a will become half as large. For the inverse of the ratio 2 to 1 ("doubles") is the ratio 1 to 2 ("half"). The terms are exchanged; the inverse of the ratio a : b is the ratio b : a.
When a varies inversely as b, we say that a is inversely proportional to b.
So to solve for r, you need to isolate the variable onto 1 side. To do that, divide both sides by 2 pi, and your answer will be 
He could buy 12 postcards for $3.36.
and 8 letters for $3.36
Answer:
4.2 units
Step-by-step explanation:
Assuming 1 grid box = 1 units, the coordinates of the two points are (-1, -1) and (2, 2).
Apply distance formula 
to find the distance between (-1, -1) and (2, 2).
Let,
Plug in the values
(to the nearest tenth)
