exam Maths Puzzle Numerical Ability

Suppose t is the total amount of tickets sold to the dance. If each of the ninth, tenth, and eleventh grades sold the same number of tickets, write an expression for the number of

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An isoscelenes trapezoid has one base 23 inches long, and a height of 8 inches. If the area of the trapezoid is 136 square inches, what is its perimeter? A varies directly as the sum of two quantities 'B'and 'c' .B in turn varies directly as X and C varies inversly as X.When X =1or 2,A=3.find the value of a when X=4