Answer:
Step-by-step explanation:
Use the given functions to set up and simplify
8
x
−
20
y
−
10
8
x
-
20
y
-
10
.
v
−
20
+
5
p
−
7
z
=
5
p
+
v
−
7
z
−
20
v
-
20
+
5
p
-
7
z
=
5
p
+
v
-
7
z
-
20
8
x
−
20
y
−
10
=
5
p
+
v
−
7
z
−
20
9514 1404 393
Answer:
see below
Step-by-step explanation:
It is easiest to compare the equations when they are written in the same form.
The first set can be written in slope-intercept form.
y = 2x +7
y = 2x +7 . . . . add 2x
These equations are <em>identical</em>, so have infinitely many solutions.
__
The second set can be written in standard form.
y +4x = -5
y +4x = -10
These equations <em>differ only in their constant</em>, so have no solutions.
__
The third set is already written in slope-intercept form. The equations have <em>different slopes</em>, so have exactly one solution.