exam Maths Puzzle Numerical Ability

Graph the function and state the domain and range.
g(x)=x^2-2x-15

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exam Other Question

The inventor of a new product believes that the cost of
producing the product is given by the function C(x)= 1.75x+7000

If the inventor charges $4 per unit, then her profit for Partners in a busness agreed to take out two loans totaling $35000. The yearly interest rates were 12% and 15%, and the total yearly interest was $4650. Find the amount of each loan.