Answer:
3 pairs
Step-by-step explanation:
After spending 78 out of 90, Staci has 12 left.
12/4 = 3
3
90-78=12
4x3= 12
12-12= 0
I think it's b . But I'm getting a different way. I get c= -b+ 2h/A I'm still working on it
Answer76%
9 hours
If there's 4 people, they each need 1.5h So you multiply 1.5 by 6 and that's how you find how long it takes for 1 person.
