exam Maths Puzzle Numerical Ability

Solve the equation
x/3=4/(x+1)

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exam Other Question

Please help me I having trouble with this problem.

Science and medicine.Celsius temperature reading can be converted to Fahrenheit reading using the formula F=9/5 C=32. Find the vertex, axis of symmetry, maximum value or minimum value, x and y intercepts.

f(x)=-3/11(x-7)2-9