This is a combination of 20 studants, 6 to 6:

$C_{2,6}=\frac{20!}{(20-6)!6!}=\frac{20!}{14!6!}=\frac{20.19.18.17.16.15.14!}{14!.6.5.4.3.2.1}=38,760 \ ways$

8 0

3 years ago

Please help Edgar used 10d to represent the number of pennies in d dollars. Is this reasonable ? Please explain if it is right o

GalinKa [24]

Not reasonable, there are 100 pennies in a dollar so the actual equation is 100d

4 0

3 years ago

PLEASE HELP!! Ill GIVE BRAINLIST IF RIGHT!! Refer to this table, which Francine, Geraldo, and Jennifer made during a bicycling t

kaheart [24]

Answer:

d = 4.5t

Step-by-step explanation:

Based on the table...

Francine covers:

9 miles in 2 hours

AND

18 miles in 4 hours

(You can use either one for this)

All you have to do is divide the $\frac{miles}{hours}$ ....

So, we can set up the fraction $\frac{9 miles}{2 hours}$

$\frac{9}{2} =4.5$ ...

So, knowing that 2 (time) · 4.5 = 9 (miles)...the answer would be

d(miles) = 4.5t (time)

So, the answer is d = 4.5t

Hope this helps!!!

4 0

2 years ago