GRAPHING CONS
1) hard to graph by hand. Often you need a graphics calculator or a computer software like maple or matlab. Or the graph has to be given.
2) hard to tell the exact solution, just by observing point of intersection. for example if x = 2.8675, the viewer would say x= 3.
3) sometimes not easy to decide the axis window of y and x axis. For example if the solution is very large like x = 100000 and your graph ends at x = 100, you cannot see the solution
SUBSTITUTION CONS
1) Becomes tedious if a system has too many equations or variables
ELIMINATION PROS/CONS
1) basically same as substitution
Answer:
yes
Step-by-step explanation:
the line is in -1 in all 4 quadrants, I will say yes but I'm not sure
Answer:
x-7y
Step-by-step explanation:
7x-9y-6x+2y
Combine like terms
7x -6x -9y +2y
x -7y
x-7y
Answer:
C) 7 pi
Step-by-step explanation:
Arc length is circumference
C = 2 * pi *r
C = 2*pi*7
C=14pi
A circle is 360 degrees. This arc is 180 degrees.
180/360 = 1/2
The arc is 1/2 the circle, so it is 1/2 the circumference
1/2C = 1/2 (14pi)
arc = 7 pi
