Write a quadratic equation with the root of 1/3 and -7/2

a-y=(x-3)(7x+2)
c-y=(3x-1)(2x+7)
d-y=(3x+1)(2x-7)

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

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Asandwich shop has 18 tables. each table seats up to 4 people. to find the greatest number of people that can be seated, you can solve p4 ≤ 18. which step is the best way to solve the inequality? plz asap i repeat plz