Answer:

Step-by-step explanation:
Since there are 20 students, this will be the denominator.
Now, to find how many students have a dog and a cat, you need to subtract all the numbers with 20. The leftover number will be the amount of students.
7+8+8=23
23-20=3
So, there are 3 students who have a dog and a cat.
So, the fraction will be 
2/3
16/24 and divide the greatest common factor (8)
The answer is 28
Hope this helped!!
Whalers is the picture to the supplementary angle 100°
Answer:
C. 5.2 cm
Step-by-step explanation:
Arc length formula:

where s = arc length
n = central angle of arc
r = radius of circle
diamter = d = 10 cm
r = d/2 = 10 cm/2 = 5 cm
n = 60 deg



Answer: 5.2 cm