Answer:
55
Step-by-step explanation:
Combinations formula is used to make choice of 'R' out of 'N' options =
N(C)R = N ! / [ R ! . (N-R)! ]
Total choices to choose 4 out of 8 friends = 8C4
= 8! / (4! 4!)
= 70
Choices for calling them 2 together = 2C2 x 6C2
= 1 x [ 6! / (2! 4!)]
= 15
So : Number of choices that the 2 friends are not called together = Total choices - choices they are called together
= 70 - 15 = 55
Answer:
the graph in the attached figure
Step-by-step explanation:
we have
Isolate the variable y
-----> Multiply by 
The solution of the inequality is the shaded area below the solid line
The equation of the line is 
The slope of the line is positive
The y-intercept of the line is the point 
The x-intercept of the line is the point 
Using a graphing tool
the graph in the attached figure
Answer:
I say that the answer is A, B, and C. I'm not positive but I think that is the answer.
Step-by-step explanation:
Tell me if I'm wrong it might just be B and C.
Your function will be 24=X+(Y+5)
to solve you subtract 5 from each side giving you 19=X+Y now you divide the 19 by 2 so you figure out the base integers giving you 9.5
now you add 5 to one of your integers meaning 9.5+5=14.5
so your integers are 9.5 and 14.5
to check this you do 14.5-9.5 which equal 5 now you do 14.5+9.5 which equals 24
So 8x5=40 and 10×4=40 so you and your friend meet at the 40 th min
