Book Maths Puzzle Algebra

Eddie's Towing Company charges $40 to hook a vehicle to the tow truck and $1.70 for each mile the vehicle is towed. Which equation best represents the relationship between the num

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Question Number 4

A function is described by the equation f(x) = x2 + 5. The replacement set for the independent varible is {1, 5, 7, 12}. Which of the following is contained I would like to know how to solve the equation x^2+8x-2=0 using both, The quadratic formula and Completing the square. And how do I compare and contrast the two methods.