book Maths Puzzle Numerical Ability

how to figure percentages of a number?

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book Other Question

Explain what the value of the discriminant means to the graph of {{{ y = ax^2 + bx + c }}}. Hint: Chose values of a, b and c to create a particular discriminant. Then, graph the c Solving a linear equation: Problem type 2

Solve for x. Write your answer as a fraction in simplest form.

4/3x + 3/2 = 7/9

Please help me understand how to do this problem.