exam Maths Puzzle Numerical Ability

soybean meal is 18% protein; cornmeal is 9% protein. How many pounds of each should be mixed together in order to get 360-lb mixture that is 13% protein?

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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? I need help with this equation find three consecutive odd integers such 4 times the product of the sencond and third is 12 times greater that 20 times the sum of the first and second