Perimeter of the rectangle = length + length + width + width
P = (3x-3) + (3x-3) + (x-3) + (x-3)
P = 3x + 3x + x + x - 3 - 3 - 3 - 3
P = 8x - 12
Perimeter of the triangle = side 1 + side 2 + side 3
P = (2x-1) + (2x-1) + (2x)
P = 2x + 2x + 2x - 1 - 1
P = 6x - 2
The perimeter is equal for both shapes
6x - 2 = 8x - 12
-2 + 12 = 8x - 6x
10 = 2x
x = 10÷2
x = 5
The length of fencing needs to be bought for each shape is (use either expression of perimeter to work it out)
P = 6x - 2 = 6(5) - 2 = 30 - 2 = 28 feet
Answer:
A line is increasing if it goes up from left to right. The slope is positive, i.e. m > 0 {\displaystyle m>0} .
A line is decreasing if it goes down from left to right. The slope is negative, i.e. m < 0 {\displaystyle m<0} .
If a line is horizontal the slope is zero. This is a constant function.
If a line is vertical the slope is undefined (see below).
I don't know if this is the answer that you are looking for, but would the answer be all solutions?