The correct answer is:
D) Jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.
Answer:

Step-by-step explanation:
The given rational equation is

The Least Common Denominator is

Multiply each term by the LCD.

Simplify;


Expand;

Group similar terms;


Divide by -8.

-2, -2, -2, +2
-2 + -2 + -2 + 2
-2 -2 -2 + 2
-6 + 2
-4
-4/ 4 = -1
His average is -1
Answer:
15
Step-by-step explanation:
Angle 2 is 2x+10
angle 4 is 4x+80
and from the figure we can understand that when we add these 2 equations
We get
6x+ 90= 180
6x = 180 - 90= 90
6x= 90
x = 90 ÷ 6 = 15
answer = 15
Y = 3x + b
Now plug in points
-7 = 3(-1) + b
-7 = -3 + b
b = -4
The y intercept is -4