Let
x-----------> the number of kids
y----------> the number of adults
we know that
2.5x+6y=$7150---------> equation 1
x=2y-------------> equation 2
substitute 2 in 1
2.5*[2y]+6y=7150-----> 5y+6y=7150----> 11y=7150-----> y=650
x=2y----> x=2*650----> 1300
the answer is
the number of kids is 1300
Answer:

Step-by-step explanation:
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Answer:4
Step-by-step explanation:
X= 2
3x= 3×2
3×2=6
6-2=4
Answer:12.8
Step-by-step explanation:
23.4375 or 24.0 is the bacteria count after 6 hours.