exam Maths Puzzle Numerical Ability

Use the quadratic formula to solve the following quadratic equation.

2x^2-5x=3

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exam Other Question

determine whether each relation is a function. give the domain and ranhe for each relation

1. {(2,7),(3,7),(5,7)}
2. {(1,10),(2,500),(13,pie)}
3. {(12,13),(14,15),(12,19)}
I need some help solving this following problem:

Vicky was charged $836 interest for 1 month on a $4,400 credit card balance. What was the monthly interest rate?

Thanks, Lisa