Answer:
1.25
Step-by-step explanation:
Find the average.
-5.1+7.6=2.5
2.5/2
1.25
Answer:
d = 9.4
Step-by-step explanation:
d=
d=
d=
d=
d=9.4
We are given that there are a total of 78 students. If we set the following variables:

Then, the sum of all of these must be 78, that is:

Since there are 15 in chemistry and physics and 47 in chemistry, we may replace that into the equation and we get:

Simplifying:

Now we solve for P by subtracting 62 on both sides:

Therefore, there are 16 students in physics
Answer:
B
Step-by-step explanation:
we have to find for what value of x the graph exists.
1) start to see on the left
- the graph ”hasn’t a start“ so it continues to go until -oo
2) notice that the graph stops when x = 0
3) match the two informations
x≤0