Answer:
Step-by-step explanation:
Number of boys = g - 7.
g - 7 + g = 23
2g = 30
g = 15.
The are 15 girls in the class.
Domain: (-∞,∞) or All real numbers
Range: (-∞,∞) or All real numbers
Let x = hours to meet
train one has a 2 hour head start or 210 km head start
210 + 105x = 135x
30x = 210
x = 7 hours to meet
Answer:
This can be found by using the permutations and combinations formuals.
Combinations being the C equation and Permutations being the P equation.
![P(n,r)=\frac{6!}{(6-6)!}=720](https://tex.z-dn.net/?f=P%28n%2Cr%29%3D%5Cfrac%7B6%21%7D%7B%286-6%29%21%7D%3D720)
Explanation:
A permutation is used for the list of data (where the order of the data matters) and the combination is used for a group of data (where the order of data doesn't matter).