Answer:
Look at the equations:
y
=
−
9
x
−
21
and
y
=
5
x
+
7
Because both equations equal (y), they both equal the same.
If an equations says "
y
=
−
9
x
−
21
" , that means we can replace (y) with
−
9
x
−
21
.
Therefore when i take the equation:
y
=
5
x
+
7
, we can replace (y) to get:
−
9
x
−
21
=
5
x
+
7
Now isolate (x):
−
9
x
−
21
=
5
x
+
7
⇔
−
21
=
14
x
+
7
⇔
−
28
=
14
x
⇔
x
=
−
2
Answer:
angle c
Step-by-step explanation:
angle c is the angle of incidence. It is the angle between the perpendicular ( line that meets the surface at 90 degrees) and the ray that is coming in
Answer:
From left to right:
Y-intercept: 160
Slope:-40
Y-intercept: 6
Slope: 1/3
Y-intercept: 600
Slope: 50
Y-intercept: -2
Slope: 3
Step-by-step explanation:
From left to right:
Y-intercept: 160
Slope:-40
Y-intercept: 6
Slope: 1/3
Y-intercept: 600
Slope: 50
Y-intercept: -2
Slope: 3
Answer:
A
Step-by-step explanation:
it's answer is 82 but I think
it will wrong