exam Maths Puzzle Numerical Ability

A person invested $17,000 for one year, part 10%, part at 12%, and the remainder at 15%. The total annual income from these invested was $2110. The amount of money invested at 12%

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The horse is tethered to a rope, at one end of a square corral(outside the corral) 10 feet on a side. The horse can graze at a distance of 18feet from the corner of the corral where the rope is tied. What is the total grazing area of the horse. find slope and y-intercept
y = 5x- 4