Math
posted by Donna .
How do I write a polynomial expression to represent the third side of the triangle? I know one side is 2x3y and the other is x+2y and P=5x+2y? I am lost.

Math 
Reiny
I will assume that P represents the perimeter.
Let the third side be S
S + 2x3y + x+2y = 5x + 2y
S = 5x+2y  2x + 3y  x  2y
= 2x + 3y
check:
What is the sum of (x+2y) + (2x3y) + (2x+3y) ??
Respond to this Question
Similar Questions

Geomentry
What is the converse of the theorem statement: If a line parallel to one side of a triangle intersects the other two sides, then it divides the two sides proportionally. If two sides of a triangle are divided in the same proportion, … 
math
find the missing length in this diagram showing a Tsquare. (reduce the radical to simplist form. 6 cm (one side of triangle) 3 cm ( other side of triangle) the third side (diagonal line conecting other two sides)= x cm. 
IRSC
the sum of the lengths of any two sides of a triangle must be greater than the third side. If a triangle has one side that 17 inches and a second side that is 1 inch less than twice the thrid side, what are the possible lengths for … 
math
the sum of the lenths of any two sides of a triangle must be greater than the third side. if a triangle has one side that is 17 cm and a second side that is 4cm less than twice the third side, what are the possible lenths for the second … 
calculus
The base of a triangle is on the xaxis, one side lies along the line y=3x, and the third side passes through the point (1,1). What is the slope of the third side if the area of the triangle is to be a minimum. 
Math
I have a triangle with one side 2y^23, a side with 2y^2+y+5, and the other side y^2+y+5. I had to write expression and simplify. This is what I got: (2y^23)+(y^2+y+5)+(2y^2+y+5) =5y^2+2y+7 I now have to determine the perimeter if … 
math
One side of triangle is onethird the longest side. The third side is 13 feet less than the longest side. The perimeter is 106. Find all three sides. 
math
determine known length for a triangle one side is 2.5cm other side 1.6cm find how solve the third side 
Math
The sum of the lengths of any two sides of a triangle must be greater than the third side. If a triangle has one side that is 22 cm and a second side that is 2 cm less than twice the third side, what are the possible lengths for the … 
math
Heather is solving an equation by graphing the expressions on both sides. If her graph intersects at an infinite number of points, which statement could describe the equation Heather is attempting to solve?