Answer:
D - 9x^(2)+2x-5
Step-by-step explanation:
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
" 8 more "....means add 8
" twice a number " means multiply the number by 2
ur expression is : 2n + 8
Step-by-step explanation:
In the picture, I hope that it's a clear solution.
