Answer:
<h2>
29</h2>
Step-by-step explanation:

Answer:
b,f
Step-by-step explanation:
b: if sandi scored 3 more points than randi, then sandis points are equal to 3+randi
f: so the equation is 3+r=s,
so input values
3+r=18
r=18-3
r=15
With only the description, my answer is 20 students.