The time t required to drive a certain distance varies inversely with the speed, r. If it takes 4 hours to drive the distance at
1 answer:
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Answer:
The center of the circle is .
Its radius is .
Step-by-step explanation:
Let represent the center of the circle, and let
represent the radius of this circle. The equation for the circle would be:
.
Expand the left-hand side of this equation using the binomial expansion:
.
.
Compare this equation with the one given in the question:
.
These two equations should represent the same circle. For that to happen, the coefficients should match. That gives a few equations about ,
, and
.
- The coefficients for
should match:
.
- The coefficients for
should match:
.
- The constant terms should match:
.
However, it is already determined that and
. That means
.
.
Hence, the radius of this circle is . Also, its center is at
.
The perimeter of triangle is: 5.5x+9
Step-by-step explanation:
Lets define perimeter firsst.
A perimeter is the boundary line measurement of any closed geometric figure"
Given
Side 1:
Side 2:
Side 3:
The perimeter of a triangle is given by:
Putting the values
Hence,
The perimeter of triangle is: 5.5x+9
Keywords: Perimeter, triangle
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