exam Maths Puzzle Numerical Ability

In any triangle, the sum of the measures of the angles is 180 degrees. In Triangle ABC, angle A is three times as large as angle B and also 16 degrees larger than angle C. Find the measure of each angle.

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Please help with this word problem.

The demand equation for a certain type of printer is given by
D = -200p + 35000
The supply equation is predicted to be
S = -p^2 + 400p - 20000

Find the equilibrium price.

Thanks!! Samuel invested a portion of $15,000 in a savings account paying 5 percent annual interest and the reaminder in a time deposit paying 7 percent. If his annual interest from the ti