Answer:

Step-by-step explanation:
Number of students participating in the competition = 13.
Total number of students in the school = 15.
Thus ,
the number of students who did not make to this competition =
Total number of students - number of students participated
= 15-13 = 2.
Now ,
probability of the student who do not makes it to the competition
= fraction of students who did not make to this competition from the total number of students .
=
.
Negative 5
means put a point 5 units to the left of 0
C is answer
Answer: The price of each gift is $5.
Step-by-step explanation:
Since we have given that
Amount = $300
Divided into equally among 5 fourth grade teachers.
so, Amount each fourth grade teacher would be

Since Number of hits that need to buy = 12
Each cost the same amount.
So, Price of each gift would be

Hence, the price of each gift is $5.
Answer:
6x-21
Step-by-step explanation:
1) draw diagram (in image)
BD=2x-21+4x
combine Like terms
6x-21