Answer:
6 times
Step-by-step explanation:
The letters are just an example of names
J a p r
J a r p
J r p a
J r a p
J p a r
J p r a
She makes 20 observations in all, because there are 5 groups with 4 students in each group. 5x4=20
Answer:
$48
Step-by-step explanation:
16 x 3 = 48
To answer we let x be the distance he covered in the first part of the trip and y be the distance in the second part of the trip. The time it took him to finish the first trip is x/8 and the second y/20. The equations that best represent the given scenario is,
x + y = 15
x/8 + y/20 = 1.125
The values of x and y are 5 and 10, respectively.