exam Maths Puzzle Numerical Ability

Bus fares from Amherst to Mount Mohawk are $26 for adults and $18 for students. How many students are on the bus if a total of $1668 was collected from the 70 passengers?

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exam Other Question

INDICATE WHETHER THE EQUATION HAS NO SOLUTION OR IS TRUE FOR ALL REAL NUMBERS. IF NIETHER IS THE CASE, SOLVE FOR THE VARIABLE.

10x-2(4+5x)=8 I graphed this inequalitity but it does not look right...
y>x^2+x-6
y