Answer:
2
Step-by-step explanation:
Answer:
C = 15
Step-by-step explanation:
Let A = # of adults and C = # of children.
A + C = 20
15A + 10C = 225
There are several ways to solve this system; here is one of them.
From the first equation: C = 20 - A
Substitute into the second equation: 15A + 10(20 - A) = 225
Multiply, collect terms, and subtract 200 from each side: 5A = 25 => A = 5
Since C = 20 - A, C = 15
30-39 is the interval because it has the most responses
Answer:
40%
Step-by-step explanation:
15-9=6
6/15=2/5=40/100=40%