Step-by-step explanation:

Answer:
9
Step-by-step explanation:
you can always use guess-and-check:
124 seems rather high
(6)P(2) = 6!/4! = 6x5 ≠ 72
(9)P(2) = 9!/7! = 9x8 = 72
Answer:
C. Biased, because she only asked students on honor roll.
Step-by-step explanation:
Since Mrs. Gilbert's goal was to find how many students that spent >4 hours and not how many students that earned Honor Roll that spent >4 hours, the data is biased. Choose C.
Answer:
y=3 and x=3*sqrt(3)
Step-by-step explanation:
sin(30)=y/6
1/2=y/6, y=3. As it's a right angled triangle, 6^2-3^2=x^2, x=3*sqrt(3)
Answer:
Slope is -8
Step-by-step explanation:
First and foremost, welcome to Brainly!
I'll begin with the basics of slope, just to help you get the gist of this crucial concept -
Slope can be rewritten as rise/run, although written formally as :

when we are given two coordinates (x,y) on the line.
One important thing to note is that slope belongs to a general equation,
y = mx+b
where b represents the y intercept and m is slope.
We're given two coordinates in your question: (6,9) and (7,1):

m = -8 is the final answer.
I hope this helps! By the way, slope is a concept that will follow you to calculus and physics, so I urge you to practice!