66 is the anwer I think I'm not for sure I hope this helps and you get it right
Answer:
48
Step-by-step explanation:
The rule is every parent means 8 students.
6 * 8 is 48.
Answer:
b=9,a=12
Step-by-step explanation:
I solved by substitution:
b = 3/4a ---> plug this into the other equation
a + b = 21 is now a + 3/4a = 21
Reduce: 7/4a = 21
a = 12
Now solve for b:
b=3/4a is now b=3/4(12)
b=9
80x70= y and then 400 - y= your answer! Ignore the four in. Deep part
