7x-2-(3x-9)-(x+7)
=7x-2-3x+9-x-7
=7x-3x-x-2+9-7
=3x
Answer:
2x + 8 meters
Step-by-step explanation:
Perimeter = 2(x + 4)
= 2x + 8
The point on a graph where a line crosses the Y-axis (The vertical line)
A
A tetrahedron is a triangular pyramid.
