Answer:
there were 200 children and 500 adults at the show
Step-by-step explanation:
7x+10y=6400
x+y=700
x=700-y
7(700-y)+10y=6400
4900-7y+10y=6400
-7y+10y=1500
3y=1500
y=500
x=700-500
x=200
3m - 5
3(m - 3) + 4 Distribute the 3
3m - 9 + 4 Simplify
(4x + 2)( 2x - 10)