The equation: 5n+3< 13 simplified to: n<2
Let x be the number of children and t, the number of adults.
x + y =153
5.2x + 8.4y = 1013.2
Solving those equation will give:
x = 85 tickets sold to the kids ( and 68 tickets for adults)
Slope: 3
Y intercept: 11 or (0,11)
Equation: y = 3x + 11
The answer is 28. 7x2=14 and then 14x2=28. Remember PEMDAS