exam Maths Puzzle Numerical Ability

tickets $20 for singles and $35 for couples, Sales $2280 and 128 people, how many of each sold?

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exam Other Question

if T=a+(n-1)d find t when a=16 n=11 and d=6
find t when a=20 n=6 and d=-2

please help me im stuck!!! write the standard form for
through (-4,2) and (-4,8)