exam Maths Puzzle Numerical Ability

Find the equation in standard form. with all integer coefficients, of the line perpendicular to 3x - 6y and passing through (-2,-1).

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exam Other Question

simplify each complex fraction?
Is this done?

Fungicides account1/10 for of the pesticides used in the United States. Insecticides account for 1/4 of all the pesticides used i a plant manager needs a solution of 77% herbicide to be mixed with a solution of 67% herbicide to form 30 liters of 74% solution. How many liters of the 77% solution must he use?