exam Maths Puzzle Numerical Ability

Solve using quadratic formula.

5x^2-x+3=0

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exam Other Question

An arithmetic student needs an average of 70 or more to receive credit for the course. She scored 80, 66, and 65 on the first three exams. Write an inequality representing the score she must get on the last test to receive credit for the course. What is the sum of a number and ten times its reciprocal and equals seven? What is this number?