exam Maths Puzzle Numerical Ability

3x-y=10

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exam Other Question

Joe was charged $437 interest for 1 month on a $3800 credit card balance. What was the monthly interest rate? 1. Solve by completing the square. Find exact solutions. Then:
a. Find the vertex.
b. Find the line of symmetry.
c. Determine whether there is a maximum or minimum value and find that value.
d. Show a sketch of the graph.