Answer:
x = 10
Step-by-step explanation:

Answer:
30 seconds
Step-by-step explanation:
Find the total distance needed to be traveled. 520-250 = 270
Find combined rate. 4+5=9
Divide distance needed to be traveled by combine rate to get answer.
270/9 = 30.
So what you would want to do is plot the points in a graph, when you do so you line the points and it will give you a triangle.
So in conclusion it should be, a.) Isosceles
The total number of people in this expermiment.